She’s been operating under the radar since her world tour came to an end last year, but Britney Spears has been spotted this week indulging in her favourite pastime…shopping.

The pop star, 28, hit Sunset Boulevard to indulge in some new outfits – one of which she liked so much she decided to wear it out of the shop.

Sadly for Miss Spears she neglected to remove the price tags on her newly purchased garments, making for an embarrassing faux pas.

Shopping trip: Britney Spears visited the Sunset Plaza in West Hollywood where she picked up a new outfit and decided to wear it out of the shop

Quick change: The pop singer put on a white vest and short patterned knickerbockers – and forgot to remove the price tags

The Toxic singer was first seen wearing a tight-fitting pink dress with tights and black knee-length boots.

She spent some time shopping in Sunset Plaza, where she picked up a new white vest top and a pair of short, patterned knickerbockers – which she left the price tag on.

As she left the West Hollywood store Britney unclipped her bedraggled hair, looking distinctly unkempt.

Unkempt: The 28-year-old mother of two let her bedraggled hair out as she left the Sunset Plaza

Muscular: Britney appeared to have bulked up during the trip

Obviously benefitting from her gym regime, Spears appeared to have bulked up in the months since her Circus tour ended last December.

Her biceps and thighs in particular appearing muscular and toned, although slightly masculine – and, as per usual, she didn’t wear a bra.

According to witnesses the singer held her stomach repeatedly during the trip, although it is not clear why she was doing this.

Something wrong? Britney was seen with her hand on her stomach on numerous occasions as she shopped in West Hollywood

Britney’s relationship with agent Jason Trawick came under scrutiny earlier this month, following reports they had ended the romance after a series of arguments.

But the couple silenced the gossip with an outing in LA on Monday, walking hand-in-hand during a trip to the Barney’s Of New York store in Beverly Hills.