MTV.com News — 'I've decided 2 use that time 4 the completion of my album,' Minaj tweets.By James Dinh Nicki Minaj Photo: Bryan Bedder/ Getty Images Just days after it was announced that Nicki Minaj would be joining Ke$ha as an opening act for Rihanna's L... more info

411 Mania — We celebrate with pics! more info

Pop Justice — Sky Ferreira - who today unveiled the video for her first big tune '17' - is kind of a big deal. If you are still reading this article after what might well be the most toe-curlingly trite final six words of an opening sentence in the history of ope... more info

AngryApe — more info

Starpulse — Rihanna and Ke$ha have joined forces for a girl power attack in America this summer.   The two chart toppers will be joined by Nicki Minaj for Rihanna's "Last Girl On Earth" North American tour.   ... more info

Idolator — Did you hear? :: Rihanna, Nicki Minaj and Ke$ha are going on tour together this summer in RiRi’s Last Girl On Earth tour, or what we like to call the 2010 Pantsless Pop Star tour. [Just Jared] :: Miley Cyrus is moving out of her parents’ house an... more info

MTV.co.uk News — Rihanna has announced she is going on tour this summer with Ke$ha.The Rude Boy star will hit the road in the US alongside Ke$ha as part of the Last Girl On Earth Tour where they will also be joined... more info

Pop Crunch — Rihanna’s hitting the road this summer — and she’s bringing two of the industry’s hottest charttoppers along for the ride. The “Russian Roulette” hottie has joined forces with Ke$ha and Nicki Minaj (The culprit behind the teen world’s ... more info

AngryApe — For the 'Last Girl On Earth' tour more info

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