Is Lindsay Lohan's bust too good to be true?

Shoppers in Los Angeles could have been forgiven for thinking Lindsay Lohan had forgotten her bra yesterday.

The reformed Hollywood hellraiser's chest was clearly visible through her sheer black vest as she visited the Jenni Kayne boutique in West Hollywood.

The 22-year-old actress has always had an enviable figure but her appearance prompted some onlookers to wonder aloud if she had received an extra boost as she visited the up and coming designer's store.

Hot to trot: Lindsay Lohan shows off her assets in a very tight top as she goes shopping in Los Angeles

Sheer cheek: Lindsay's transparent top leaves little to the imagination

Wearing rolled up boyfriend jeans, peep toe heels and a black vest, Lindsay looked casual chic as she joined her celebrity stylist pal Patrick Aufdenkamp and girlfriend Samantha Ronson.

The outfit was completed by a obligatory accessory for any celebrity - a pair of Ray-Ban sunglasses.

DJ Samantha also opted for denim, teaming her jeans with a black Washington DC T-shirt and white sunglasses.

Lindsay's apparent choice to go braless isn't the first time she's been spotted without underwear.

She was famously photographed with no knickers on during a troubled time for the actress two years ago.

After not being seen together for several months, Lindsay's re-acquaintance with Patrick will concern the actress' family.

Shopping buddies: Lindsay with her friend Patrick Aufdenkamp (L) and girlfriend Samantha Ronson (R) leave the store

Earlier this year, pals of the star expressed disapproval at Lindsay's friendship with him, believing he was a bad influence.

The actress has been fighting to stay sober since several spells in rehab last year and a stint in jail as well as being sentenced to community service following her driving under the influence arrests.

A family source told TMZ.com in February: 'He has nothing to offer her and he looks at Lindsay as his meal ticket.'

Last week, Lindsay admitted she considering adopting a child in the future.

She told the latest edition of Marie Claire magazine: 'At some point, I want to adopt a kid as well.

'A child in need or a newborn from another country. I’m not sure yet.'

After months of rumours, Lohan finally confirmed she was in a relationship with Ronson - sister of artist/producer Mark Ronson - last month.

Speaking to the magazine, a defiant Lohan declared: 'People can think what they want. I'm really happy and that's all that matters.'

The couple are so content that they are reportedly looking at buying an apartment together in New York.

Last week, they were photographed looking loved up on holiday in Mexico.