Super producer Timbaland has ruled out a rumoured collaboartion between himself and former lovers Justin Timberlake and Britney Spears - until the TOXIC singer apologises for "dissing" him. The hitmaker, who has become Timberlake's regular sidekick, admits the two pals almost hit the studio with Spears to help her with a comeback record, but now insists chances of the dream collaboration happening are slim. And it's all because of the pop star's attitude. Timbaland tells MTV News, "It'll never happen... It could've, but it won't." In an interview earlier this year (07), the producer confessed he was seriously considering working with Spears, telling Entertainment Weekly magazine, "I just want to take her away, go overseas and work out." And he told the publication that his pal Timberlake was keen to get involved. But the pair scrapped plans to help Britney out when she got "so big-headed, and (was) like, 'Screw you, screw you, I don't need nobody.'" But, without going into detail about what Spears did to upset him and Timberlake, Timbaland insists she could still salvage the situation if she apologises for her bad attitude. He adds, "She should humble herself and make a phone call and say, `I'm sorry.' She knows what she's sorry about." "She needs to say, `I was wrong,' and it'll definitely move forward... That's all she has to say."