The Smashing Pumpkins are about to put out their new album, Monuments To An Elegy, and they celebrated with a show at Koko in London on Friday night. Marilyn Manson was a special guest during the concert and came out during the encore to perform his new song “Third Day Of A Seven Day Binge” and join the band on “Ava Adore.” Manson told Gigwise before the show that he had been rehearsing with the band all week, and that it was the first time he’d seen Billy Corgan in 15 years. (Last year, Manson told Larry King that Corgan was mad at him ever since he said it would be a good marketing idea “if [Corgan] sold Charlie Brown T-shirts and bald caps at concerts … He does look like Charlie Brown a little bit.”) Earlier this week, hatchets were buried when Courtney Love shared an Instagram photo of her with Corgan and Manson. Watch below.

See all hatchets buried and true love never dies in the heart @billy #billybaby @marilynmanson you're awesome baby xc

A photo posted by Courtney Love Cobain (@courtneylove) on Dec 12, 2014 at 5:47pm PST

The Smashing Pumpkins are scheduled to play two more shows in the coming weeks: one at Webster Hall in NYC on 12/8 and another at the Forum in Inglewood, CA on 12/14.

[Photo via Instagram.]