(Yahoo!) - Who knew Kim Kardashian and Oprah Winfrey were new besties! At least that's what it looked like when the unlikely duo posed for a photo together, along with Kim K.'s boyfriend, Kanye West, and music mogul Diddy at a party hosted by music producer Jimmy Iovine on Saturday.

The reality star posted the fun shot to Twitter along with the caption, "Oh no big deal." Uh, we say it's a big deal!

So what was the reason for the big bash, including all the star-studded guests like Mick Jagger and Steven Tyler? Iovine was celebrating the birthday of his girlfriend, Liberty Ross, the 34-year-old British model who filed for divorce from Rupert Sanders in January after he got a little too cozy with Kristen Stewart. Talk about an interesting mashup of celebs!

Also there? The queen of daytime's real-life bestie, Gayle King. But the best part of the night was when Oprah herself posted a few pics to Instagram of Gayle and Mick getting down on the dance floor. (Who knew she had moves like Jagger!)

Check out the video to see the A-listers in party mode, and be sure to check out "omg! Insider" on TV tonight for all the latest in entertainment news.