When the Foo Fighters throw a birthday party, you just know it’s going to be epic! Yet, you are not prepared for the awesomeness you’ll experience. Front man Dave Grohl turned 46 and the band celebrated with a concert at The Forum in Los Angeles. Tickets were on sale and three charities were benefited by the event; Rock School Scholarship Fund, MusiCares, and Sweet Relief. Some of the most amazing rockers in the world stopped by; not only to wish a Happy Birthday but they joined the band on stage. Kiss’ Paul Stanley, Lemmy Kilmister, David Lee Roth, Alice Cooper, Trombone Shorty, Zakk Wylde, Tenacious D, Slash, Perry Farrell, and Kyuss’ Nick Oliveri all performed or covered classic rock songs during the concert. The Foo Fighters performed some of their own songs as well. Check the concert set list below.