Although the official announcement has yet to be made, details about the lineup for Mayhem 2011 are leaking around the web. Let's hope the rumors are true, because this is a great lineup! The official announcement will be made Monday. Here's the rumored lineup from blabbermouth.net...

Main Stage:
DISTURBED
GODSMACK
MEGADETH

Rotating Opening Slot On Main Stage:
MACHINE HEAD
IN FLAMES
TRIVIUM

Second Stage:
SUICIDE SILENCE
UNEARTH
STRAIGHT LINE STITCH
ALL SHALL PERISH
KINGDOM OF SORROW

Main Stage:
DISTURBED
GODSMACK
MEGADETH

Rotating Opening Slot On Main Stage:
MACHINE HEAD
IN FLAMES
TRIVIUM

Second Stage:
SUICIDE SILENCE
UNEARTH
STRAIGHT LINE STITCH
ALL SHALL PERISH
KINGDOM OF SORROW