Celebrating Earth Day on Wednesday, Kim shared a snap of her wearing a tiny white bikini with string detail, as she stood in what looked like a jungle shower.

‘In honor of Earth Day here is my best plant selfie from my new book #Selfish coming out May 5th! #ivegotaselfieforeveryoccasion.’

While enjoying Earth Day, Kim was of course also plugging her book of selfies that is soon to be released.

A week ago she posted a VERY busty snap to her Instagram account, plugging the new product and encouraging followers to buy it.

‘Obsessed with @Gilt’s exclusive, limited-edition version of my new @rizzolibooks release, Selfish. Only 500 signed copies, get yours at NOON ET tomorrow at gilt.com/selfish!'

‘I’m going to be posting some exclusive selfies that are in the book!’

Will you be buying Kim's new release when it comes out in May?