This week's best dressed with Katy Perry and Jessica Alba in lookalike Versace

Versace was the designer of choice for Katy Perry and Jessica Alba this week, with both stars opting for lookalike dresses.

In Sydney, Katy Perry hit the red carpet in a figure-hugging frock and earned her place in our best dressed list for a second week running.

The songstress paired the nude number, which was detailed with netting and subtle embellishments, with killer Christian Louboutin heels. Dreamy...

Meanwhile, Jessica Alba also sexed up her style as she hit the Atelier Versace couture show at Paris Fashion Week.

Updating the classic LBD, the actress showed off her figure in a skin-tight leather dress, which also featured fierce studs.

So, who's your best dressed celeb this week?

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Jessica Alba