Lindsay Lohan enjoyed a night out on the town ... grabbing a bite at Mr. Chow in Beverly Hills. What a sheer delight!

The 25-year-old starlet, sporting a long ponytail, shades and no bra, proudly carried her pricey blue Birkin bag into the eatery.

Between purchasing sea jasper in Venice, doing random photo shoots and heading to dinner at celebrity hot spots ... this girl is busy!

See more of Lindsay out and about in Beverly Hills ... after the jump.