Kim Kardashian might not be having Kanye West's baby, but the two certainly seem to be up to something. The duo were spotted at the same Culver City, California, recording studio on Tuesday. Kim was accompanied by momager Kris Jenner as well as TV cameras, while Kanye showed up all on his own.

In photos posted on TooFab.com, Kim is seen walking into the studio wearing boots, a baggy T-shirt and cargo jeans. Kanye, who is set to make an appearance on Kim's new show airing this January, is seen wearing leather pants, a white T-shirt and a leather jacket.

"OMG u guys have no idea what I'm doing today! You are gonna DIE!!!! OMGGGG I'm nervous!!!!!!" she tweeted the same day the duo were spotted at the studio.

"Its going down in here!!! Will twitpic soon! I'm turning it ooooonnnn!!!!" she later added. "What should my alter ego name be? What an amazing day!!! I'm finished for today...but we have a few more to go! Can't twitpic just yet but will soon! Feels so good to overcome a fear!"

Whatever she's up to, with or without Kanye, Kim was still busy on Wednesday (December 29). She tweeted, "Day #2 let's go!"

For his part, Kanye has been pretty quiet on Twitter. His last tweet was on December 27, when he shared, "New dreams... New problems... New solutions."

In November, when rumors first surfaced that they were up to something musically, Kim danced around the topic. "He's a musical genius, so I would be honored to work with Kanye," she told MTV News. "It's all in fun. We're just trying to have a good time."

What do you think about Kanye and Kim's musical, um, kollaboration? Let us know in the comments!