Friends and family are asking for prayers after Nashville-based singer-songwriter Terri Lynn Kathey went missing over the weekend. The gospel and blues singer — who has also performed under the name Terri Lynn Blues — and her husband, Nashville-based drummer Kevin Kathey, own a courier service. According to family friend Kerry Pharr, Kathey left home at about 4:30AM on Sunday morning (June 16) to go pick up a package at Music Valley Drive near Opryland Hotel in Nashville. She used her debit card at Hardee’s on Elm Hill Pike nearby at around 6:30AM, Pharr tells Taste of Country. The package was…