Joan Smalls – The Cayman Islands

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While Iceland might not immediately spring to mind as a go-to summer destination, Pitch Perfect’s Rebel Wilson apparently can’t recommend it enough. The actress devoted numerous paragraphs to the destination on Instagram, in particular The Retreat hotel, found in the country’s Blue Lagoon, which she said was “the best” (while also reiterating that it wasn’t a sponsored post). The £1,000-a-night hotel is the first luxury offering at the Blue Lagoon and features 62 suites which come with stunning views of the lava or direct access to the lagoon itself.