We've been working with Hostelworld since 2015, repositioning them as a cool way for young travellers to meet the world. A key challenge has been overcoming outdated perceptions of the accommodation. So we've created a series of online films starring some very unexpected guests. They showcase the quality of hostels these days – without being a boring brochure. The most recent Unexpected Guest is none other than world renowned A-list diva, Mariah Carey.