A long white dress, a 40-year wait, and a roar that shook the Kia Forum. Rush opened their Fifty Something Tour in Los Angeles on June 7, their first show in 11 years, and the night delivered a moment fans had never seen live: Aimee Mann walked out to sing her parts on “Time Stand Still,” the 1987 single she recorded with the band but had never performed with them onstage until now. Mann sang her ethereal part on the choruses, marking their first live performance of the song together, 40 years after she sang on the studio version. Geddy Lee and Alex Lifeson anchored the reunion, with German drummer Anika Nilles filling the chair once held by the late Neil Peart and Loren Gold handling keys, the band weaving multiple Peart tributes through a three-hour, 22-song set.