Categories Events Photos Popular Launch Party at Siren Lab Studios in Los Angeles Posted on April 9, 2015April 9, 2015 Author admin No Comments on Popular Launch Party at Siren Lab Studios in Los Angeles Kat attended at the Popular Launch Party yesterday, she was with her friends Olivia Holt and Sadie Calvano. GALLERY LINKS: Events And Appearances > 2015 > Popular Launch Party at Siren Lab Studios in Los Angeles (April 8)