The Seat Filler (2004)

The romantic comedy The Seat Filler stars Duane Martin as a law student working very hard to keep his head above water financially. He takes a job as a seat filler at a big awards function where he meets a famous singer (Kelly Rowland). She believes he works in show business and he does nothing to disabuse her of this notion. That leads to him having to go to larger and larger measures to keep his lie going when their relationship continues.