Colton Haynes & Katie Cassidy: Wango Tango Duo

Colton Haynes sports a “Blame Me” t-shirt on the orange carpet at the 2013 102.7 KIIS FM’s Wango Tango concert held at The Home Depot Center on Saturday (May 11) in Carson, Calif.

The Arrow actor was joined by his co-star Katie Cassidy.

PHOTOS: Check out the latest pics of Colton Haynes

The night before, their co-star Colin Donnell was spotted signing autographs outside of Bootsy Bellows after a night out with his girlfriend Zelda Williams in West Hollywood.

15+ pics inside of Colton Haynes, Katie Cassidy, and Colin Donnell out and about…