On sale: Friday, April 25

O.A.R.: With the Beautiful Girls, 7:30 p.m. July 25, Meadow Brook Music Festival, $20, $35.50.

Stone Temple Pilots: 6:30 p.m. June 4, the Fillmore Detroit, $49.50-$89.50

Sheryl Crow: With James Blunt and Toots & the Maytals, 7 p.m. Aug. 5, DTE Energy Music Theatre, $25-$59.50.

Rock City Festival: With more than 50 live music performances by Sloan, Von Bondies and more, June 12-14, Majestic Theatre Complex and C.A.I.D., $20 daily, $30 weekend.

On sale: Saturday, April 26

John Mellencamp: With Lucinda Williams, 7:30 p.m. July 18, DTE Energy Music Theatre, $20-$85.

Eric Hutchinson & Marie Digby: 8 p.m. May 23, Magic Bag, $12.

Rockstar Energy Drink Mayhem Festival: Featuring Slipknot, Disturbed, Dragonforce, Mastodon, Machine Head, Airbourne, Five Finger Death Punch, Walls of Jericho, Underoath, Black Tide, Suicide Silence, the Red Chord and 36 Crazyfists, 2 p.m. Aug. 9, DTE Energy Music Theatre, $32.75-$57.25.

Deadstring Brothers: With Mat Mays & El Torpedo and Doop & the Inside Outlaws, 8 p.m. June 13, Magic Bag, $10.

Fred Eaglesmith: 8 p.m. Sept. 20, the Ark, $20, $27.

Jackopierce: 8 p.m. Nov. 13, the Ark, $20, $27.

Enter the Haggis: 8 p.m. Nov. 15, the Ark, $15, $22.

Willy Porter: 8 p.m. Nov. 7, the Ark, $17.50, $24.50.

Frigg: 8 p.m. Sept. 30, the Ark, $15, $22.