iHeartMedia's "On-Air With Ryan Seacrest" has a new co-host. Following the move of Ellen K to mornings at AC 103.5 KOST Los Angeles in October, 102.7 KIIS-FM middayer Sisanie will move into the co-host role at the syndicated morning show. The announcement was made on-stage at KIIS-FM's Jingle Ball Concert. While no official announcement has