LONG BEACH, Calif. (KABC) -- A mass same-sex wedding ceremony kicked off this year's Long Beach Lesbian and Gay Pride Parade on Sunday.Tens of thousands of spectators were expected to line the downtown streets of Long Beach for the 33rd annual event.The parade is the culmination of a weekend of events, including a two-day festival at Rainbow Lagoon Park.Sunday morning, thousands of festival-goers turned out for the weekend of celebration with rainbow flags and colorful outfits. Many were there to show support for their friends and family.This year, the event was also holding a "love wins" mass LGBT wedding ceremony at 9:30 a.m. at Ocean Boulevard between Cherry and Junipero avenues.The parade was set to begin at 10:30 a.m. at Ocean Boulevard and Lindero Avenue and continue onto Ocean Boulevard to Alamitos Avenue.All were treated to live musical acts that will culminate with a performance by the band Neon Trees later in the evening.This year's theme is solidarity.