Lindsay Lohan and Max George dating? Actress joins The Wanted on tour bus

Lindsay Lohan showed up Wednesday (Dec. 5) night backstage in Philadelphia at Q102's Jingle Ball concert to hang with The Wanted -- the same guys she was partying with prior to her arrest on Nov. 29 for allegedly punching a woman in the face.

But according to TMZ, band member Max George, Lohan's rumored crush, originally told people he didn't invite Lohan backstage and had no idea how she got there. However, sources say by Thursday he had confessed to inviting the actress to the VIP area at Wednesday's show.

Plus, Lohan is reportedly now in Boston with the band, having traveled there with The Wanted on their tour bus -- as George's invited guest.

But, according to sources, George, who recently broke up with girlfriend Michelle Keegan, definitely "doesn't want a girlfriend, and is a single guy ... but doesn't mind having Lindsay around."

How romantic ...