Britney: Radar which peaked at 14 (all Britney songs went to top 5 with 5 of them holding the top)
Kanye: Power (33)
Coldplay: Every Teardrop is a Waterfall (Bubbling under #4)
Chris Brown: She Ain't You which peaked at number 6. I love Chris' music so you'll never get to see him flop
Based on my countdown - Best Thing I Never Had. It peaked only @ #17 and spent only 9 weeks. For instance, every other song went to #1 (Love on Top, Countdown, Party,1+1, End of Time, I Was Here and Dance for You).
Rihanna helped the most...by tossing shade at Ciara's new song, she forced many people who otherwise wouldn't be checking for ciara to listen to "Body Party"... Ciara could be a big rival for Robyn....Rihanna may have signed her own death warrant with that act... but she is brave