Justin Timberlake and Scarlett Johansson were seen holding hands and dancing sexily at the Super Bowl after-party.The 'SexyBack' singer - who recently ended his four-year relationship with Cameron Diaz - got very cosy with Scarlett at Miami's Mokai club after watching the Super Bowl.A source told the New York Post newspaper: "They were talking, dancing, holding hands all night - it was very cosy."Then, as they left through the back, Justin was leaning against the wall and Scarlett came up, leaned into him and did a sexy little dance, grinding into his body."The pair became close after the 'Lost in Translation' actress starred in Justin's latest video. They were seen in a New York nightclub shortly after Justin split from Cameron.Just a week later the former *NSYNC star was joined by Jessica Biel at Utah's Sundance Film Festival, where his new film 'Black Snake Moan' premiered. Justin and Jessica were seen snowboarding and spending time together...more