Facebook launched its location-based service called "Places" which allows users to share their location and tag friends at the same location. Users can opt-out of the service if they want. Dove came up with a creative marketing campaign for their body lotion by writing messages on hotel room mirrors that would appear when the mirrors steamed up after guests showered. A Gillette ad featuring Roger Federer received over 5 million views in 5 days through viral marketing on YouTube. Sony created a Facebook game called "Media Monster Wars" where users could build a monster using content on their Facebook profile and battle their friends or Justin Timberlake. Barclays Bank created a Facebook game targeted at youth to promote their brand which was played