10 Artists Who Sang Back Up For Britney Spears

As it turns out, a lot of people have collaborated with Britney Spears. And interestingly enough, a lot of prominent singers have lent their vocals to the singer — appearing on a number of her tracks, including “Piece of Me” and “Lucky.” It makes you wonder what the song would have sounded like if they had taken over. But alas, we’ll never know.

1. Bonnie McKee, “Ooh La La”

The singer is the same writer responsible for practically all of Katy Perry’s hits. McKee and Perry secretly sang background vocals on the Smurfs 2 track.
2. Justin Timberlake, “What It’s Like To Be Me”

Back when JT and Spears were dating, he and Wade Robinson co-wrote a track for her third album. Oh the good ole days.

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