mickey has played electric guitar , acoustic guitar , bass , keys , synthesizer , percussion , programmed and sung background vocals on major album projects for george strait , trace adkins , joe nichols , reba mcentire , steven tyler , billy gilman , country strong ( soundtrack ) , heidi newfield , katrina elam , jeff bates , act of valor ( soundtrack ) , chuck wicks , kevin fowler , thomas rhett , andy griggs , kristen kelly and more .