The visuals mostly show Cassie singing next to Ryan Leslie while he plays the piano in a dance studio, as other clips from Step Up 2 are interspersed between different shots of the two performers.

[1] It was preceded by the Platinum single "Me & U," which peaked in the top ten of several countries, including number three on the US Billboard Hot 100 and spent seven weeks atop the US Airplay chart.

[4] It was also announced she had been cast on the sequel to the 2006 American dance film Step Up from Touchstone Pictures as Sophie Donovan, portrayed as a "triple threat, and supposed to be an intimidating character towards [the lead] Andie.

"[5][6] Cassie didn't plan being featured on the soundtrack, initially wanting to separate her music career from the acting,[7] but when approached for song submissions, she recalled during an appearance on MTV's Total Request Live to promote Step Up 2, she had been recording in Los Angeles before shooting the movie, and came up with "Is It You."

[9][10] AllMusic's Andy Kellman picked "Is It You" as one of the soundtrack album's highlights, saying it "is Cassie's most "pop" song yet, as light as a feather, reliant mostly on a simple combination of handclaps and a fuzzy guitar.

"[14] The Guardian's Alex Macpherson called it a "delightful bubblegum pop song made touchingly human by the hint of tentativeness in Cassie's performance: the slight gasp she gives after the line "I'm looking for someone to share my pain," for instance, as if mindful of the risk she's taking in revealing too much of herself.

"[15] Pitchfork ranked it at number seventy of the top 100 tracks of 2007, with Tim Finney writing: "Cassie's singing is sweet and understated, the emotive guitar-dominated arrangement is pleasant more than startling, and the song's tangle of hope and uncertainty is instantly familiar," continuing that "it's precisely this which makes "Is It You" such a tantalizing proposition: With every possible obstruction to pop transcendence gently moulded away, we're left only a gleaming paean to the first flush of romance and it's all the more affecting for its modest universality.