Lady Gaga And Yoko Ono Perform Together…What?

I don't know quite why this picture jumped out at me and caught my attention.  I guess it was just kind of strange to see these two together?

Singer Lady Gaga (L) and singer/artist Yoko Ono perform together at the "We Are Plastic Ono Band" at the Orpheum Theater this year in Los Angeles, California.  Kind of fun to look at The Year In Review via pics.