Bombshell in Balmain! Alessandra Ambrosio smoulders at Harper's Bazaar bash at Sunset Tower Hotel

Alessandra Ambrosio joined the 'The Supers' section of the new Harper's BAZAAR list of the 150 Most Fashionable Women.

The 35-year-old was a showstopper when she turned up to a party TUMI, American Express, La Perla and Hearts On Fire threw in honour of the magazine.

She bared a good deal of cleavage in a robe-like rust-coloured Balmain number with flowing sleeves that fell past her hem.

Alessandra Ambrosio joined the 'The Supers' section of the new Harper's BAZAAR list of the 150 Most Fashionable Women

A fair bit of fringe had crept over her forehead, though the majority of the Erechim native's hair had been wound into a high bun.

Her waistband cinched to showcase her enviably svelte torso, and crisscrossing swathes of fabric opened over a miniskirt section.

Heightening the vertiginous look of her taught legs, she'd slid into a gleaming pair of gold-coloured ankle-strap stilettos.

Swirl of fabric: The 35-year-old was a showstopper in Balmain when she turned up to a party TUMI, American Express, La Perla and Hearts On Fire threw in honour of the magazine

Whilst at the Sunset Tower Hotel in West Hollywood for the event, she hobnobbed a bit with her confrère on the list, Kendall Jenner.

The 21-year-old's lacy black La Perla number, rather resembling a nightie, featured a long slit up its right side and gave a view of the white teddy underneath.

The February issue commemorating the magazine's 150th anniversary, which is already on newsstands, features Madonna on the cover.

Dynamic duo: Whilst at the Sunset Tower Hotel in West Hollywood for the event, she hobnobbed a bit with her confrère on the list, Kendall Jenner

Its list's drawn from such categories as 'The Cool Girls,' 'Red Carpet Rule Breakers,' 'High Society,' 'The Supers,' 'Modern Mega Stars' and 'Music Powerhouses.'

Honourees therein include Beyonce, Kim Kardashian, Priyanka Chopra, Lupita Nyong'o, Charlize Theron, Naomi Campbell, Cindy Crawford and Adele.

Extracts from the houses of power include ex-US First Lady Michelle Obama and the Duchess Of Cambridge, as well as Lee Radziwill, sister of Jacqueline Onassis. 

Special occasion: The February issue commemorating the magazine's 150th anniversary, which is already on newsstands, features Madonna on the cover

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