The Guitar
(2008)

Melody Wilder (Saffron Burrows) loses her job, her boyfriend and finds out she has cancer!  

With only two months to live, she rents a loft in Greenwich Village, maxes out her credit cards, learns to play the guitar and has sex with a delivery man and a delivery woman.  

After not dying she goes back to her doctor (Janeane Garofalo), and learns that the cancer is....gone!  Apparently she changed so much that the cancer no longer recognized the host.  

Healthy but homeless, she is adopted by a band and is last seen jamming with them in a club!   

Thanks Don P!