People were "Bubbly" as they came in swimsuits and beared the sun while singing and dancing to the various artists that graced the stage at the 13th annual Day in the Zone concert at Discovery Park. Howie Day, Colbie Callait, Hoobastank, and Train were the performers for the show put on by 100.5 FM The Zone. "I came to see Colbie," Anika Polyak of Serendipity Boutique said. "It's really hot out, and it's not as crowded as last year's show, but it's still good." Callait was definitly the crowd favorite, from her new song "I Won't" atop a firetruck ladder to her acoustic version of "Bubbly." "Colbie should have headlined the show,"first-time attendee Brandon Osburn said. "I bet a lot

"I remember the first night we heard ourselves on 100.5 The Zone," said Method Echo lead singer Josh Guerrero. "It was like that movie [That Thing You Do] with The Oneders: Everybody was stoked and pumped up, we were calling each other [saying], 'Oh my goodness we're on the radio.' " Friday night, Method Echo will be bringing its funky soulful style of rock 'n' roll to End of Summer Fest in Cesar Chavez Plaza. Pop-singing piano player Shannon Curtis and pop-rock vocalist Bobby Zoppi will open the concert (click links for MySpace). The members of Method Echo first met more than 10 years ago at Harvest Church in Elk Grove (the pastor was guitarist Tyler Hagan's father). Then teenagers, the