Justin Bieber hired a private island to celebrate his birthday. The 'Baby' hitmaker turned 21 yesterday and marked the milestone occasion with a lavish celebration on a Caribbean island close to Grenada, TMZ reports. The festivities began late on Saturday evening and continued into Sunday, with the birthday boy appearing to be having a good time. Videos and pictures posted on social media showed him dancing shirtless to 50 Cent's 'In Da Club' while clutching a large bottle of champagne. He later tweeted: "Grateful to be alive!!! Love u!!! 21 "I love everybody! #21 "Thanks for all the birthday love. Grateful for everything. Let's be better this year. Thanks (sic)" Ahead of his island party, Justin was overjoyed to be presented with a classic 1965 Lincoln Continental by friends last week.