In the county
Middle Sister, Chris Swam and Greg Gottlieb
Synopsis: Acoustic pop group Middle Sister opens the concert with Child of Mischief, featuring Swam and Gottlieb, closing the show.
When: 6:45 p.m. Sunday
Where: Westminster City Park, 11 Longwell Ave., Westminster
Admission: Free, but a donation of a personal care item will be collected to benefit Human Services Programs of Carroll County.
In the region
Def Leppard with Poison
Synopsis: It's going to be a metal Tuesday in Columbia. Def Leppard's sold more than 100 million albums and Poison, fronted by Bret Michaels, is best known for its 80s No. 1 single "Every Rose Has Its Thorn."
When: 5:30 p.m. Tuesday
Where: Merriweather Post Pavilion, 10475 Little Patuxent Parkway, Columbia
Information: 410-715-5550 or http://www.merriweathermusic.com
Coldplay's Mylo Xyloto Tour
Synopsis: The British alt-rockers make a return to the area with two shows. Robyn and Wolf Gang serve as the opening acts.
When: 7 p.m. Sunday and Monday
Where: Verizon Center, 601 F. St., Washington, D.C.
Information: 202-628-3200 or http://www.verizoncenter.com
Neon Trees in concert
Synopsis: The alt-rockers from Utah have their first legit crossover hit with "Everybody Talks," which has cracked the top 25 of Billboard's Hot 100 singles chart, which tracks hits from all genres.
When: 7 p.m. Wednesday
Where: 9:30 Club, 815 V St., Washington, D.C.
Information: 202-265-0930 or http://www.930.com.