Is Demi Lovato finding it hard being around Joe Jonas?

Demi Lovato was papped arriving back at her hotel in NYC, looking like her current touring schedule is taking its toll on her.

Demi is used to working hard, reports Entertainmentwise, so could it be her strained relationship with ex-boyfriend Joe Jonas that is making the singer look unhappy?

Joe dumped Demi earlier this year and they are currently on tour together, surrounded by various rumours – like the false “friends with benefit” rumour which Joe has threatened to sue over, or the rumour that he is dating Twilight actress Ashley Greene.