Songfacts®:

• Brown sings about how much he loves and needs his girl in this song. The track was produced and co-written by the Norwegian production team StarGate, who were also the team behind Beyoncé's hit "Irreplaceable." A number of critics and bloggers have commented on the similarities between the instrumentation of the two songs.
• Chris Brown told MTV News about the video: "I co-directed it as well, and it shows me more solo. Like, it shows the grown side of Chris - it doesn't show the kiddie side. 'Cause with this album, I wanted to blend, I wanted to do all different visuals of me. The first [video] 'Wall to Wall,' the acting, the vampires, the spookiness, then you go to 'Kiss, Kiss,' that had the little goofy part, now this one is solo, the main [performer] is me. Me freestyle dancing - just showing people me naturally, not a choreographed routine, just me dancing and showing you what I'm capable of. But at the same time, just having fun with the camera, and just one-on-one time with me and my audience."
• Bravo HipHop Special magazine asked Chris Brown what this song meant. He replied: "When I heard the song for the first time, it touched me immediately. Therefore it was really easy for me to put my personal feelings and experiences inside it. I think that the secret of the track is that everyone can identify themselves with it no matter how old you are."
  
  The magazine also asked the R&B singer if he thought about a special person when he person when he performs this song. Brown replied grinning: "The love to my fans is the inspiration for this song. I sing it particularly for them."
• The lyrics for this song were the most searched for of any tune on Google in 2008.
• This song topped the charts in several countries including Turkey and New Zealand. In the US it spent six non-consecutive weeks at #2, first behind Flo Rida's "Low," then Usher's "Love in This Club."