Britney Spears models a selection of dresses as she celebrates return to Vegas residency

</p> <h2>Britney Spears models a selection of dresses as she celebrates return to Vegas residency</h2> <p> She goes through dozens of outfit changes during her stage show. And Britney Spears proved she hasn’t even nearly tired of trying on clothes as she treated fans to a mini fashion show on Wednesday.<br /> The 35-year-old looked stunning three times over as she showcased a trio of her hottest dresses in an Instagram video.</p> <p>