On Saturday night, the Rolling Stones, the rock's most enduring band, was celebrating its 50th anniversary. At such a big event, when a number of top actors were present, the celebration could have been incomplete somehow if Lady Gaga had not shown up.

Yes! The sexy Lady Gaga also joined the final anniversary bash with conceit-king Bruce Springsteen at the night. The Black Keys, John Mayer and others were already at the show, the report finds.

Everyone rocked upstage, including The Boss who was out with the band on "Tumbling Dice", the Black Keys, who came up on "Who Do You Love" and Gaga who joined Mick Jagger on "Gimme Shelter". The audience was just so excited for the Stones band had provided them the aging yet dynamic foursome.

But, while John Mayer, Gary Clark Jr. and all were coming with their considerable guitar chops with Ronnie Wood and Keith Richards performing on "Goin' Down", the Stones were absent from upstage.

Then was heard a dismayed voice of Jagger, who said, "We just wanted to send our love and condolences to all the people who lost loved ones in the tragedy in Connecticut". The band acknowledged the deaths of six adults and 20 children at an elementary Newtown school in Connecticut during a shoot. This is probably what has made the band a greatest one.