Looks like Rihanna is expanding her music knowledge -- with a little help from Blink 182's Travis Barker. "Teaching Rihanna some things on drums. She JAMS!!!!! Watch out for her!!" Barker posted on Twitter Tuesday, along with a photo of the pair at a rehearsal space in L.A. Although Rihanna is seen jamming behind a drum kit in the video for her latest single, 'Rude Boy,' rumor has it she wants a pro to teach her how to play so she can perform live on her upcoming European tour.