Ahwatukee Foothills Girl Scouts and their families will offer a free festive celebration of Mother's Day for a special concert performed by national recording artist who only goes by the name Teresa. The event will be held from 2:30 to 4:30 p.m. Sunday at Mountain View Lutheran Church, 11002 S. 48th St., Ahwatukee. The concert is open to the public.Four years ago, Teresa debuted her popular single release "I Love Being A Girl Scout," at the National Girl Scout convention in Atlanta. She has performed numerous times since convention, including a sing-along gathering of 200,000 Girl Scouts on the National Mall in Washington, DC.