Pop superstar Lady Gaga attracted an estimated 2.5 million people to her performance Saturday in Rio de Janeiro.

Lady Gaga broke the record for the highest-attended ... Aerosmith's Steven Tyler performs during the Boston Strong benefit concert at the Boston TD Garden in Boston, May 30, 2013.

Brazilian police said they’d arrested two people and disrupted an alleged bomb attack at a free Lady Gaga concert that some 2 ...