Yours Truly also debuted in the top 10 in several other countries, including Australia,the UK, Ireland, and the Netherlands. By April 2014, the album had sold over 500,000 copies in the United States, and later it became Grande's first platinum album. The lead single, "The Way" featuring Pittsburgh rapper Mac Miller, debuted at No. 10 on the US Billboard Hot 100, eventually peaking at No. 9 for two weeks, and spent 26 weeks on the Hot 100. Grande was eventually sued by Minder Music for copying the line, "What we gotta do right here is go back, back in time" from the 1972 song "Troglodyte (Cave Man)" by The Jimmy Castor Bunch. Following the release of the album, Billboard magazine ranked Grande at No. 4 on their list of "Music's Hottest Minors 2013", an annual ranking of the most popular musicians under the age of 21.The second single, "Baby I" debuted at No. 21 on the US Billboard Hot 100 chart, making it her second Top 40 hit. The song also debuted at No. 6 on the US Billboard Hot Digital Songs chart, making Grande the only female music artist to debut two songs in the top 10 of the Hot Digital Songs chart during the year 2013. The third single, "Right There", featuring Detroitrapper Big Sen, debuted at No. 84 on the Billboard Hot 100 chart. In the 2013 Nickelodeon film Swindle, an adaptation of the children's book of the same name, Grande played Amanda Benson. That same month, she lent her vocals on the duet "Almost Is Never Enough" with Nathan Sykes of the British boy band The Wanted. She also joined Justin Bieber on his Believe Tour for three shows and kicked off her own headlining mini-tour, The Listening Sessions. At the 2013 American Music Awards, she won the award for New Artist of the Year. She released a four-song Christmas EP, Christmas Kisses in December 2013. Christmas Kisses received critical praise for its "R&B spin" on the Christmas classics. By January 2014, Grande had begun recording her second studio album, with singer-songwriter Ryan Tedder and record producers Benny Blanco and Max Martin. Grande is also credited as a songwriter on several tracks of the album.The same month, she earned the Favorite Breakout Artist award at the People's Choice Awards 2014. In March 2014, Grande sang at the White House concert, "Women of Soul: In Performance at the White House". The following month, President Barack Obama and first lady Michelle Obama invited Grande again to perform at the White House for the Easter Egg Roll event along with collaborator Big Sean. A duet with R&B singer Chris Bron, "Don't Be Gone Too Long", was scheduled for a March 24 release date but was delayed because of Brown's legal problems. Grande received the Breakthrough Artist of the Year award from the Music Business Association, recognizing her achievements throughout 2013, including her No. 1 debut on the Billboard 200 with her first album and her top 10 single on the Hot 100. Grande released her second studio album My Everything on August 25, 2014, with Rolling Stone magazine writing that "My Everything is where the 21-year-old Nickelodeon starlet grows up. It's a confident, intelligent, brazen pop statement, mixing bubblegum diva vocals with EDM break beats". It sold 169,000 copies in its first week and debuted atop the Billboard 200, becoming her second consecutive No. 1 album in the US. Its lead single, "Problem", features Australian rapper Iggy Azalea and premiered at the 2014 Radio Disney Music Awards on April 27. The song debuted at No. 3 (eventually climbing to No. 2) on the Billboard Hot 100, and debuted at No. 1 on the UK Singles Cart, becoming Grande's first No. 1 single in the United Kingdom. It made British chart history as the first song to land at No. 1 based on sales and streams. The song was noted for being the highest debut ever for a collaboration of female soloists. The second single, "Break Free", featuring German musician and producer Zedd,peaked at No. 4 on the Billboard Hot 100 and No. 1 on the Hot Dance/Electronic Songs. As of March 2016, the futuristic video had been viewed more than 600 million times. She performed the song at the opening of the 2014 MTV Video Music Awards, while winning Best Pop Video for her single "Problem". As of May 2016, that video had been viewed more than 800 million times. She also provided guest vocals on "Bang Bang" with Jessie J and Nicki Minaj, the lead single from Jessie J's third studio album Sweet Talker (2014). The song reached No. 3 in the US, Grande's third song in the Hot 100's top 10 the same week ("Problem", "Break Free" and "Bang Bang") and went to No.1 in the UK. She joined Adele as the only female artist with three top 10 hits simultaneously as a lead artist. The music video for "Bang Bang" has been viewed more than 700 million times on YouTube Billboard's review noted that My Everything is not kid-friendly, like Grande's earlier efforts, and stated:
She has pulled more sounds into her repertoire while keeping her biggest weapon, a remarkable vocal range, as a steady foundation. ... My Everythingis a less cohesive project than Yours Truly, although its best moments eclipse the highs of Grande's 2013 debut. The singles "Problem" and "Break Free" remain dizzying dance tunes, and back-to-back solo songs "One Last Time" and "Why Try" possess the types of flawless melodies that are typically reserved for the world's biggest pop divas. The back half of the album's many collaborations are hit-or-miss.
On September 27, 2014, Grande was the musical performer on the season 40 premiere of NBC's Saturday Night Live, with Chris Pratt hosting. Three days later, the third single from My Everything, "Love Me Harder", featuring Canadian recording artist The Weeknd, debuted on the Billboard Hot 100, peaking at No. 7. In November 2014, Grande was featured in Major Lazer's song "All My Love" which was released as the fourth single from the soundtrack album for the film The Hunger Games: Mockingjay – Part 1. The same month, Grande released a Christmas song titled "Santa Tell Me". Spending 34 consecutive weeks in the top 10 of the Billboard Hot 100 in 2014, Grande had the most top 10 singles of any artist that year. She later released a fifth single from My Everything, "One Last Time", which peaked at No. 13 on the Billboard Hot 100. By April 2015, the album had sold over 600,000 copies in the US and is certified double platinum by the RIAA.