New York, Sep 15: Singer Selena Gomez looked unfazed as she resumed work on the yet-untitled Woody Allen's film here hours after revealing that she underwent a kidney transplant earlier this year. Gomez seemed like she was in a good mood. She wore a mini skirt, an orange sweater and round glasses as she walked on to the film's set on Thursday. She was accompanied by a bodyguard, reports dailymail.co.uk. Details about the project and Gomez's character have been kept under wraps. However, it is known that she will share screen space with Jude Law, Diego Luna, Liev Schreiber and Elle Fanning in the movie. Gomez announced that she underwent a kidney transplant as part of her battle with Lupus, on Instagram on Thursday morning.