Swedish House Mafia at Los Angeles State Historic Park

Like a snippet of a hit song in one of their fast-moving disc jockey sets, the dance-music megastars of Swedish House Mafia are leaving us almost as soon as they arrived. The Stockholm trio — which started affecting Top 40 charts in 2010 with the Pharrell Williams collaboration “One” — will launch its so-called One Last Tour, a global trek scheduled to play the 35,000-capacity Los Angeles State Historic Park next March. You can understand the group’s early retirement as a going-out-on-top maneuver. But might Axwell, Steve Angello and Sebastian Ingrosso be going out too early? “Until Now,” their second full-length album, comes just as a growing crew of dance producers — including Avicii, Zedd and Calvin Harris — are moving successfully into pop (M.W.). Los Angeles State Historic Park, 1245 N. Spring St., L.A. 4 p.m. Fri.-Sat. $79.50-$99.50.