After a few years of heavy touring - headlining concerts alongside the likes of
Slipknot and
Rammstein - System of a Down returned to the studio in early 2004 to record a double album,
Mezmerize/Hypnotize. Though initially to be released as a single unit, they were instead released separately in 2005, with
Mezmerize seeing a May release while
Hypnotize hit store shelves in November of that year. Both albums reached #1 on the Billboard 200, making System of a Down one of only a handful of bands (along with the
Beatles and
Guns ‘N Roses) to have ever had two albums reach #1 within the same year. Standout tracks from
Mezmerize/Hypnotize include
"B.Y.O.B." and
"Question!"
In 2006, amidst breakup rumors, System of a Down announced that it would be going on hiatus for the foreseeable future, though its members have not yet ruled out the possibility of a reunion. Currently, SOAD’s members are heavily involved with a number of other musical projects, among them
Scars on Broadway and
Mt. Helium.