Last week it was announced that Rihanna would be taking Nicki Minaj and Ke$ha on her [article id="1635473"]Last Girl on Earth Tour[/article] this summer. But just days after the announcement was made, the Young Money rapper said that [article id="1635623"]she wouldn't be able to hit the road[/article] after all, citing the fact that she wanted to focus on recording her debut album.

When MTV News caught up with [article id="1637154"]Ke$ha at rehearsals for "Saturday Night Live"[/article] where she's this week's musical guest, the "Tik Tok" singer had no idea about Minaj's plans.

"I hadn't heard that. Is that true? Oh, that's a bummer," she said. "I have no idea why and I hadn't even heard that, but that's a bummer." She went on to say she had to think for a while about who she'd like to see replace Minaj on the tour. "I'll get my wheels turning. I wasn't aware of that, but I'll totally think about it. I mean, I'm just so excited to be on the same stage as Rihanna. She's obviously an incredible performer, singer, woman. So that tour's going to be so much fun."

But what should fans expect from her set on the tour? Well, apparently, costumes made of laser beams. "I want to wear a lot of laser beams," Ke$ha said. "Oh, you'll see [how I'll do that], honey!"

And much like [article id="1629617"]her debut album Animal[/article], she said her show will be one big party. "It definitely is going to have, like, a dance-party vibe," she explained. "I just want it to be really, really fun. Let's just say I can't disclose, but I have, like, a really, really awesome thing that's going to happen ... and you can only understand it if you see it in person."

Who do you think should join Ke$ha and Rihanna on tour? Tell us in the comments below!