It was a bold outfit as it made her white brassiere and nude underwear very visible to onlookers, reports a website.
The 25-year-old also gave her fans a chance to see her newly-dyed grey hair as she stepped out of her hotel on Thursday.
The singer, who is currently on her 2013 Diamonds World Tour, even appeared nude at her hotel balcony on the French Riviera in Monaco.
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