Before Lady Gaga's heart-stopping performance of her Best Song nominated "Til It Happens To You," Lady Gaga joined music legend (and Oscar winner) Sir Elton John for a rousing rendition of "Don't Let The Sun Go Down On Me" on Sunset Blvd in West Hollywood.
The event was a 'thank you' to the city of West Hollywood for hosting Elton's annual Academy Awards viewing party.
From Rolling Stone:
"The City of West Hollywood has welcomed the Elton John AIDS Foundation and our annual Academy Awards Viewing Party with open arms for many years, providing us with the perfect environment to host a really fun and special evening," John said in a statement prior to the concert. "We are profoundly grateful for their generous support, so I wanted to do something special just for them by giving our West Hollywood fans and supporters a surprise concert. Thank you, West Hollywood!"