Brittany Cartwright in a swimsuit after losing almost 40lbs since welcoming her first child

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Vanderpump Rules star Brittany Cartwright posted a pinup photo this week to Instagram that lit up her page.The 33-year-old reality TV siren said in her caption, 'Sunshine & Positive Vibes!

I feel incredible!'This comes after she said she has lost a whopping 39lbs after welcoming her first child, son Cruz, with herhusband Jax Taylor.

Slim and sweet:Vanderpump Rules star Brittany Cartwright posted a pinup photo this week to Instagram that lit up her page The 33-year-old reality TV siren said in her caption, 'Sunshine & Positive Vibes!

I feel incredible!'In January she teamed up with Jenny Craig which has helped her with weight loss.'I'm down 39lbs!! Woo hoo,' wrote Brittany, who shot to fame alongside Jax during their time on Vanderpump Rules.She took the show to her main Instagram page, where she posted a behind-the-scenes video montage from her latest Jenny Craig shoot.