As one of the biggest bands on the planet, you'd expect U2 to celebrate 40 years in the business in typical rock star fashion.
But the Dublin four-piece settled for cake and balloons as they celebrated 40 years in music on Sunday.
In a mock video that the band shared on Facebook, all four members can be seen sitting in silence at the get-together. The quietness is only broken by the sound of The Edge blowing a streamer and Bono popping a balloon.
The video has been watched over one million times as fans toast the band's milestone.
They formed on September 25, 1976 after a young Larry Mullen Jnr posted an advertisement for members to join his band on a noticeboard at Dublin's Mount Temple school.
It read: "Drummer seeks musicians to form band" and Adam Clayton, Paul Hewson (Bono) and Dave Evans (The Edge) all replied and in a career that's spanned four decades, U2 have gone on to become one of the biggest bands in the world.