Salt Lake City's Red Butte Garden won't announce its summer concert line-up until April — but sometimes the performers can't keep a lid on the news.

The names of two more acts have trickled out, thanks to the musicians' own websites:

• Comedy/music legend "Weird Al" Yankovic will bring his parody songs, his original tunes and his accordion to town on Friday, Aug. 5. It's Yankovic's first time at Red Butte.

• Blues singer/guitarist Bonnie Raitt — who last performed at Red Butte in 2012 — will return for a show on Sunday, Sept. 11.

Yankovic and Raitt join a line-up that will include two previously announced acts: The Lumineers on May 25 (which is already sold out), and Ben Harper and the Innocent Criminals on June 29.

Tickets for this year's concert series go on sale to Garden members on April 25, and to the general public on May 2.