The Beastie boys is an American Band that plays Hip Hop, it was formed in 1981
I love the Beastie Boys! I remember them well. I cannot remember how many were in the band, do you know?
They were 3, Micheal Diamond,Adam Yach, and Adam Horovitz 
What was their #1 hit?
Their first EP as they call it was first EP, called  "Polly Wog Stew" was released in 1982.
I think my favorite song from them was "Fight for your Right to Party". Any idea what year that came out?
I'm not sure but I was sad to know that Adam  Horovitz was actually a replacement for an early member Berry that left the band 
Oh really? I didn't know that. I definitely remember listening to them in High School.