Lindsay Lohan's Birthday Kiss For Samantha Ronson

Lindsay Lohan led the celebrations for rumoured girlfriend Samantha Ronson's 31st birthday on Wednesday.

Sam may have been booked for a DJ gig on her special day but that didn't stop the inseparable pair getting romantical at Los Angeles's Crown Bar.

People reports:

At promptly five past midnight, the music was silenced and Lohan led the club in a rendition of "Happy Birthday" while presenting Ronson a cake and a lingering kiss.

Between handing out cake to their friends, the gals got cozy in the deejay both and snapped photos of themselves. Lohan spent most of the early morning dancing back-to-back with Ronson, who closed out her set around 1:30 a.m.

The couple have so far refused to confirm reports they are in a same-sex relationship, but that hasn't stopped rumours that they are now planning to exchange vows in a Los Angeles commitment ceremony.

According to reports, Lindsay's mother Dina is planning a lavish reception party to "welcome Sam into the family".

Check out their birthday affair here!