Beastie Boys - Wembley Stadium 1999
Supported by the Jungle Bros
Was my first proper Hip-hop gig
Glastonbury the same year (I think). Jurassic 5, The Roots, Everlast and Cypress Hill (pre-beef), Scratchperverts, DOOM, Slum Village, Black Twang (with Rodney P, Skinnyman and some of Mudfam), and I've a vague recollection of seeing either Cash Money or Prodigy but can't be certain.
One hell of a weekend for Hip-hop!!