Justin Timberlake is in talks to make a guest appearance with Timbaland and Duran Duran at Saturday's (07Jul07) Live Earth gig in London, according to reports.
The singer is due to perform in the capital's The O2 on Saturday evening as part of his FutureSex/LoveSounds tour, but arrangements are allegedly being made for the star to perform on stage at London's Wembley Stadium in the afternoon.
A source tells British newspaper The Sun, "Justin and Timbaland have been rehearsing.
"They have something special up their sleeve for fans at Wembley. They are juggling the schedules to make it happen."
However, a spokesperson for the star denied he was being lined up to perform at the global extravaganza.