lilorockstargfxlogo.jpgLindsay Lohan goes through Rockstars quicker than a 1980's groupie ... but Lilo's kind is in a can.

The 24-year-old starlet's first photo post rehab showed her clutching a Rockstar Energy Drink ... and just last night while filling up her new Maserati with gas, Linds was only an arms reach from her favorite caffeine-infused thirst quencher. However, Rockstar wants to make it clear ... they didn't pay her a dime for the "out-of-this-world exposure!"

A Rockstar rep tells X17online exclusively:

    "Lindsay did not get paid for that moment, we were happily surprised to see that she is one of many who loves Rockstar Energy Drink."


After being offered $1 million from a New York radio station to host a morning talk show with her mom ... and with her reported $1 million offer from OK! Magazine for an interview and spread, it's not like she needs the money, right?

Must be nice to be in demand ... again. What a rockstar!