[reece(:]

The Saturdays - Higher (feat. Flo Rida) - pointless rap
M.I.A. - Exodus/Sexodus (feat. The Weeknd) - couldn't hear him at all
Carishma - Keep Hangin' On (feat. Timbaland) - just murmuring weird noises
Janet Jackson - So Excited (feat. Khia) - Khia was robbed of a decent verse
Katy Perry - E.T. (feat. Kanye West) - original was better
Space Cowboy - Falling Down (feat. Chelsea Korka) - she should have had lead vocals
Ke$ha - Blah Blah Blah (feat. 3!Oh3) - they appeared for about 10 seconds, what's the point
3!Oh3 - My First Kiss (feat. Ke$ha) - same as above.
Vince Kidd - The Zoo (feat. Vanessa from The Saturdays) - she deserved a bigger part.
Jennifer Lopez - I'm Into You (feat. Lil Wayne) - he ruins the song.
Demi Lovato - Really Don't Care (feat. Cher Lloyd) - Cher deserved more than 20 seconds.
Sean Kingston - Rum and Raybans (feat. Cher Lloyd) - Same as above.
Scissor Sisters - Shady Love (feat. Azealia Banks) - she didn't really add much, wish she had a rap.
Neon Hitch - Gold (feat. Tyga)
Paradiso Girls - Patron Tequila (feat. Lil Jon) - boring ad libs, doesn't warrant a feature.
I won't continue going onto the many other pointless raps added to songs by dull rappers like Pitbull, Flo Rida, Tinchy Stryder, Lil Wayne, Rick Ross etc.

I'm sure there's plenty more, like Iggy not getting a long enough verse in Katy B's Light As A Feather.. OK I'll stop now.