Jennifer Lopez was super over all things American Idol and The Boy Next Door when she headed to a promo event in New York City on Monday. She's so over it -- she can't even ...

The 45-year-old is filming Idol this week in NYC, as well as doing press for her upcoming thriller, which also stars rumored new toy boy Ryan Guzman and hits theaters on Friday. Sounds exhausting!

During an appearance on Good Morning America, Lopez talked to Robin Roberts about her new role, saying that she identified with the character.

"[Claire Peterson is] late 30s-early 40s...separated about to go through a divorce, deciding, feeling like at her lowest point in her life. You know how that is, her husband's cheated on her. She doesn't know how to deal with it, and is not feeling desirable," said the singer/actress.

We will never understand how a sultry siren like Lopez could feel undesirable -- but we guess even superstars have bad hair days (although that seems doubtful) ...

For now it seems like everything is coming up roses for Jenny so we don't know what could be bugging the superstar, but we know one thing -- don't mess with JLo when she's having a bad day ...