Big bands, like the Black Eyed Peas, are getting set to invade the streets of the Gaslamp. The 25th annual Street Scene is kicking off this weekend with nearly 50 bands headed to America's Finest City.

Set up crews started putting together the five stages, pitching tents and putting in portable potties at the crack of dawn Wednesday. Production manager and event organizer Riley Hagey says it's a huge project.

"It's downtown San Diego," Hagey said. "It's a living, breathing thing. You have businesses. You have cars going through. It's not like we're in a big park."

Crews must work quickly considering they have only two days to transform six San Diego blocks. Fabio Comana is part of the set up crew.

"It's going to be a lot of work before we get it done," Comana said.

Around 70,000 people attended last year's Street Scene, and organizers are expecting similar crowds this year. Black Eyed Peas will headline the event Friday night, and M.I.A. is the main attraction on Saturday. Other notable bands include: Modest Mouse, Cake, Conor Oberst, Thievery Corporation, The Dead Weather and Silversun Pickups

Street Scene goes from 4 p.m. to midnight Friday and Saturday, August 28 and 29. It's located in East Village right next to Petco Park. Two days passes cost $95. You can get more information on Street Scene by visiting the Street Scene Web site.