Back again in its 14th year the Vans Warped Tour is the ultimate way to sweat your ass off while watching a pile of bands (from emo, punk, alternative, metal and more) and gazing at extreme action-packed sports, along with other activities. Music acts on this years tour include alternative pop rockers Cobra Starship, emo-rock babes Mayday Parade, ska-sters Reel Big Fish, hard-core pros Norma Jean, the sarcastic pop-rocker gal Katy Perry and a whole lot more. $24.50. 11 a.m. Verizon Wireless Amphitheatre, 707 Pavilion Blvd. www.livenation.com. www.warpedtour.com.