Justin Timberlake took his mother (RIGHT) as his date to the premiere of his new film on Wednesday night.The 'SexyBack' singer - who has allegedly split from girlfriend Cameron Diaz - was accompanied by his mom, Lynn Harless, to the Hollywood premiere of 'Alpha Dog', in which he stars with Bruce Willis and Sharon Stone. Justin, 25, and his 45-year-old mother also attended the after-party together at Ivar Studios where they hung out with members of the 'Alpha Dog'cast until 11pm. They then moved on to the Social Hollywood club where they met up with Scarlett Johansson - who recently filmed a video for one of Justin's songs and who he is rumored to be romantically pursuing. Wearing jeans and a tank top Scarlett, 20, had an hour-long one-on-one conversation with Justin before the pair were joined by his mom. The trio were later seen dancing to the Jackson 5's classic hit 'ABC'. Later on, Justin rejoined his co-stars while Lynn and Scarlett talked until the club closed at 2am, when the singer and his mom left through the back door.

Sexy Cameron Diaz