"Infinity" is a song by American singer and songwriter Mariah Carey from her sixth compilation album, #1 to Infinity (2015). It was released by Epic Records on April 27, 2015, as the only single from the album. Carey wrote the song in collaboration with Eric Hudson, Priscilla Renea, Taylor Parks and Ilsey Juber. Carey and Hudson also produced the track. It is an R&B song; the lyrics are about Carey putting herself first and emancipation. However, many critics likened the content to the singer's separation from her then-husband, entertainer Nick Cannon.

Critical response to "Infinity" was positive, with Carey's vocals and humorous songwriting praised. Particular emphasis was placed on the reference to Fritos. In the United States, the song reached number eighty-two on the Billboard Hot 100, and charted on several R&B component charts. In Europe, it peaked at number twenty-seven on the UK R&B Chart, and made the top twenty in Spain and top thirty in Hungary. Carey performed a medley of her 1990 debut single "Vision of Love" with "Infinity" at the 2015 Billboard Music Awards, Live! with Kelly and Michael and Jimmy Kimmel Live!. The accompanying music video was directed by Brett Ratner and filmed during one of Carey's Las Vegas residency shows.

"Infinity" is the only new recording to be included on Carey's third greatest hits album, #1 to Infinity (2015). It was written and produced by Carey and Eric Hudson, with additional songwriting from Priscilla Renea, Taylor Parks and Ilsey Juber. Carey unveiled the single's artwork on April 24, 2015, via music identification service Shazam. Mike Wass for Idolator wrote that Carey exudes "overpowering glamor" and "looks typically ravishing in a cleavage-exposing, black ensemble, which she accentuates with huge diamond earrings and fabulous windswept hair."

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