"Kissin U" is a song by American recording artist Miranda Cosgrove from her debut studio album, Sparks Fly. Cosgrove co-wrote the song with Claude Kelly and Dr. Luke; the latter also co-produced it with Ammo. The album's only single, it was released on 7" vinyl and Cassette tape format on March 22, 2010, and to mainstream radio on May 11, 2010. The single was later released in Australia in early July. The single is Cosgrove's first official musical release, after making several soundtrack appearances for some of her shows and films, such as iCarly and the 2009 animated comedy film, Cloudy with a Chance of Meatballs. It also made an appearance on the 2010 compilation album Now That's What I Call Music! 35

The song has been praised by music critics, and has performed well on music charts, becoming Cosgrove's biggest hit to date. It is her first single to make an impact on U.S. radio stations, where it even entered the top twenty of the U.S. Pop Songs chart, which focuses mainly on radio airplay in the United States. Aside from its success on US radio stations, the single also became a major digital download hit for Cosgrove, leading it to chart on Billboard's Hot 100 singles chart. It has also charted in several international music charts, including Germany and Austria, among others.

"Kissin U" was first announced in late February as the lead single from Cosgrove's untitled upcoming album. The single was previewed on Ryan Seacreast's radio show, On Air with Ryan Seacrest on March 12, 2010, with the song being released on 7" vinyl and Cassette tape format on March 22, 2010. During an interview with MTV about the song, Cosgrove stated that

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