Kanye West performs for Facebook
Kanye West is making sure he's up to date with the social networking sites.
The star - who is set to release a new album - has joined Twitter, one day after going to the offices of Facebook in California to preview some of his new material.
Videos of the artist rapping while standing on a conference table have been posted on YouTube.
Kanye later posted a letter to Facebook on his website, thanking the staff for their support, saying: "Your energy was a gift so electric, so genuine, that it really helped me give my best."
An email request for comment from Facebook was not immediately returned.
Kanye's new album, which doesn't have a title yet, is expected to be released September 14.