The Swell Season provided fans with an extra special performance last night in Los Angeles, Calif. when funny man Jason Segel joined the musicians on stage. Segel, who played piano, performed an original song accompanied by the Swell Season.

When Segel asked Marketa Irglova how to write a meaningful song, she told him to "write from the heart and include as much personal information as possible." Segel took this advice to heart and literally provided as much personal information as possible.

Segel laid it on pretty thick for the ladies in the crowd. He kicked off the song with the lyrics, "Would it be wrong to use my celebrity status to make love to a Swell Season fan tonight?" He went on to repeat his phone number while Irglova carried a sign around stage with the number listed, just in case anyone missed it. Segel also brought up his film and television roles. He melodiously sang, "Remember when I was in that show 'Freaks and Geeks?' Well there were no special effects, so if you thought I was sweet, yeah I'm really that sweet." Segel also sang about his nude scene in 'Forgetting Sarah Marshall' and, ahem, "what he's working with." Check out the video below!