Lady Gaga Shares Stage, Backside With Lennons (PHOTOS)

Is that a rear-end, or is Lady Gaga just excited to see Yoko Ono and Sean Lennon?

Yes, the Fame Monster superstar let it all hang out during her stage time with the wife and son of late Beatles legend John Lennon during a ‘We Are Plastic Ono Band’ performance in California over the weekened. Jane’s Addiction frontman Perry Farrell also helped the star-studded line-up rock out.

Click here to run through the Gaga-Lennon gallery, which features the see-thru-butt-shot that everyone’s talking about. Then, do be sure to check out Celebuzz’s 12 Movies Lady Gaga Should Get Cast In.