(Credit: Getty Images)
Whoa! That happened last night! Here you see Lady Gaga on the Carnegie Hall stage with Bruce Springsteen, where the two icons performed Journey's "Don't Stop Believin'" at the legendary New York City venue for The Almay Concert To Celebrate The Rainforest Fund's 21st Birthday. The environmental foundation was founded by Trudie Styler, who is also known as Mrs. Sting. Performers included Gaga, Elton John, the aforementioned Sting and Mary J. Blige.
If Gaga looks positively demure in the pic above, don't worry; she wound up leaving the venue in typical Ga-ga-ooh-la-la style:
Yup. Just a lady rocking a bejeweled catcher's/Hannibal Lecter mask. Nothing to see here.