Justin Timberlake's Biel kiss

Justin Timberlake and Jessica Biel were seen kissing at a Malibu party last week.The couple arrived at a friend's birthday party holding hands on April 6.A source told Us Weekly magazine: "If Jessica was talking to a group of girls, Justin would come over, kiss her neck and start making out with her."Shortly after Justin split from Cameron Diaz, he and Jessica were seen flirting at Prince's post-Oscars party and also enjoyed a skiing holiday - but denied they were dating.The 'SexyBack' singer was then seen out with Scarlett Johansson while Jessica went on several dinner dates with her 'Blade: Trinity' co-star Ryan Reynolds in February and March.While Jessica and Justin canoodled at the party, Ryan and Scarlett were enjoying their own romantic dinner date at New York restaurant Odeon.A source said: "They were definitely together."