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Brittany Cartwright looks like she's got her sparkle back ... and she's bragging about her life without estranged husband Jax Taylor .

The 'Valley' star just posted a photo dump on Instagram as part of a life update ... and she looks happy and healthy, sharing photos of her career, friends, a cute dog and son, Cruz .

Brittany's all glammed up in most of the shots ... working on set, doing some filming and going out for dinner with her girlies.

She also shared a shot of her swimming with Cruz in a pool ... plus an adorable puppy. Gallery Launch Gallery

In other words, Brittany's saying life is great over here.

Meanwhile, her estranged husband Jax is having a bittersweet ending with his bar, Jax's, in Studio City ... he's stepping away and the establishment has al

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