Article continues below advertisementIrina Shayk got a head start on summer in a sultry bikini look.The model, 40, stripped down to a black bikini top and bottoms with cross detailing on Tuesday, April 21.Shayk captured a mirror selfie from her room, with a scenic mountain view visible from the window behind her.Article continues below advertisementTap Here To Add Ok Magazine as A Trusted SourceSource: @irinashayk/InstagramIrina Shayk sizzled in a black bikini look.Later, the brunette beauty bared her cleavage in a brown two-piece, accessorized with aviator sunglasses and a wide-brimmed hat.