ContactMusic — RIHANNA and KE$HA have joined forces for a girl power attack in America this summer (10).The two chart toppers will be joined by Nicki Minaj for Rihanna's Last Girl On... more info

Perez Hilton — This is quite a big deal - for Ke$ha! Rihanna is hitting the roadfor a full out North American tour this summer. This is RiRi's first-ever headlining tour of the U.S. and we think it's gonna be a risky outing. Will she be able to fill out those big ... more info

VH1 News — Rihanna announced her Last Girl on Earth Tour with Ke$ha and Nicki Minaj. The trio will hit 25 cities across North America; addition dates will be announced. more info

People.com — The pop stars will take on 25 arenas this summer more info

Big Apple Music Scene — Over the weekend, we were mesmerized by British pop singer Taio Cruz’s sexy music video for “Dirty Picture” with Ke$ha. So we got to wondering — who was this crooner from the other side of the pond? By age 26, Taio had released the gold selli... more info

MTV.com News — The trio will hit 25 cities across North America; additional dates to be announced.By MTV News staff Rihanna Photo: Florian Seefried/ Getty Images It's about to be one busy summer for Rihanna. The singer has just announced that she'll be hi... more info

ContactMusic — British singer TAIO CRUZ originally wanted LADY GAGA to sing on his new single DIRTY PICTURE - but dropped plans to approach the singer when he discovered KE$HA.The... more info

Detroit Free Press — Top 10 selling iTunes tracks 1 Train, "Hey, Soul Sister" 2 Taio Cruz (feat. Ludacris), "Break Your Heart" 3 Rihanna, "Rude Boy" 4 B.o.B (feat. Bruno Mars), "Nothing on You" 5 Lady GaGa, Beyoncé, "Telephone" 6 Lady Antebellum, "Need ... more info

Big Apple Music Scene — Ke$ha makes a cameo in British up-and-comer Taio’s music video for his single “Dirty Picture,” which his label has cleaned up here by subbing out the word “dirty.” What do you think? Is Ke$ha trying to out-drrrrrty like 2002-era Xtina? Is T... more info

VH1 News — 3Oh!3 discuss "First Kiss," their "fun" collaboration with the "rad" singer Ke$ha that will appear on their upcoming album, Streets of Gold. more info