By 1991, Queen had drastically scaled back their activity, causing many rumors to circulate about Freddie Mercury's health. On November 23, he issued a statement confirming that he was stricken with AIDS; he died the next day. The following spring, the remaining members of Queen held a memorial concert at Wembley Stadium, which was broadcast to an international audience of more than one billion. Featuring such guest artists as David Bowie, Elton John, Annie Lennox, Def Leppard, and Guns N' Roses, the concert raised millions for the Mercury Phoenix Trust, which was established for AIDS awareness.