"Tonight (I'm Fuckin' You)", also known as "Tonight (I'm Lovin' You)" or simply "Tonight…" in a "clean" version, is a song by Spanish singer Enrique Iglesias. It features American rapper Ludacris and producer DJ Frank E. The song was released to the US radio on November 1, 2010, as the album's second U.S single and it was released digitally on November 22, 2010. The song was included on the French Limited Edition of Euphoria as well as the New Edition of "Euphoria" which was released in 2011. The official remix features American rapper Pitbull. The clean version of this song was also performed at Fuse's Z100 Jingle Ball 2010 on December 16, 2010.

Pop duo Karmin have also unofficially covered the song