An unknown band called the Holy S---s are playing a show tonight (Sept. 10) at a small club in Brighton, England, and another tomorrow in London. Why should you care? Because the Holy S---s are actually the arena rockers known as the Foo Fighters.

It all began late last week as the band was in London ahead of headlining the closing ceremony of the Invictus Games on Sunday when they tweeted the following:

The Foos followed that up with this:

Yesterday, they revealed they would play tonight under the name the Holy S---s at Concorde 2 in Brighton. Check out the flier:

Twitter

And just today, the band unveiled details of a free second club show on Sept. 11 at the House of Vans in London:

Tickets for the London show go on sale at 4PM via Twitter. We're no math majors, but that means there should be one more not-so-secret show to be announced (if they are in fact playing "3 club gigs this week").

Foo Fighters are set to release their eighth album, 'Sonic Highways,' on Nov. 10 with an HBO documentary series about the creation of the album to premiere Oct. 17.

Foo Fighters -- 'Sonic Highways' HBO Series Trailer