Spoon, Sheryl Crow and Aerosmith's Steven Tyler also come together to perform at New York tribute show
Prince, U2 and Foo Fighters are among the artists cancelling gigs in the wake of the attacks
Flowers brought out special guest during performance at The Wiltern
The singer released his solo LP 'The Desired Effect' in May
'Come Out With Me' has featured at shows in North Carolina and Oakland
The Killers man thinks style is important, but admits he's still searching for his signature look
Duo performed track in House of Blues, Boston last night (August 3)
The Killers' frontman also played a Spoon cover
Video was recorded at Flowers' acclaimed solo shows at London's Brixton Academy in May
The Killers frontman recently released solo album 'The Desired Effect'