Monday night (12/9) in NYC, Beacon Theatre hosted the star-studded 30th annual Rainforest Fund Benefit Concert, featuring Sting (who co-founded the charity with his wife, Trudie Styler), a reunited Eurythmics, Bruce Springsteen, John Mellencamp, Bob Geldof, Debbie Harry, Darryl "DMC" McDaniels, Shaggy, James Taylor, H.E.R. and more. Robert Downey Jr hosted the evening -- which was themed "We'll Be Together" (Sting's 1987 hit single) and celebrated songs of the '80s and '80s -- and he opened the night by covering Robert Palmer's "Addicted to Love," complete with backup singers who looked straight out of that song's video.

It was a very rare show of Eurythmics, with Annie Lennox & Dave Stewart only having performed one other time together in the last decade, and at Beacon they performed their hits "Would I Lie to You?," "Here Comes the Rain Again" and "Sweet Dreams (Are Made of This)."

Bob Geldof performed Boomtown Rats' classic "I Don't Like Mondays" and covered Nick Lowe's "(What’s So Funny ‘Bout) Peace, Love, and Understanding)."

John Mellencamp played "Jack and Diane" solo before bringing out Bruce Springsteen for "Pink Houses." Bruce returned the favor by bringing John out for "Glory Days" and then playing "Dancing in the Dark."

DMC, meanwhile, came out during Debbie Harry's set for Blondie's "Rapture," and also performed Run DMC/Aerosmith's "Walk This Way" (and pulled James Taylor into the song briefly). Sting performed "We'll Be Together" with former Rolling Stones backup singer Lisa Fischer and also covered Peter Gabriel's "Sledgehammer." Shaggy, meanwhile, performed Eddy Grant's 1982 hit "Electric Avenue"

The night ended with the backing band -- including Narada Michael Walden, and onetime Letterman show band members Will Lee and Felicia Collins -- and everyone else from the evening coming out to sing Journey's "Don't Stop Believin'."

Check out video and a few pics from the night below.