Spring Shake-Off 2K7, featuring Omarion and Marques Houston, kicks off the season tomorrow at Rams Head Live. Omarion, who left the group B2K in 2005, released his second solo album, 21, late last year with the Timbaland collaboration "Ice Box." Houston (pictured) went solo in 2003 after performing with Immature/IMx. Houston has also worked as a songwriter and in production. DJ K-Swift, Young Leek, Deuce Tre Deuce and Amazon are also slated to perform. Doors for this all-ages show open at 8 p.m. tomorrow at Rams Head Live, 20 Market Place. Tickets are $25-$30. Call 410-244-1131 or go to ramsheadlive.com.