GET WELL'S FOR SINGER ROBBIE WILLIAMS

Victoria Beckham has sent a "get well soon" message to troubled singer Robbie Williams.The former Spice Girl wrote a heartfelt letter of support to Robbie as soon as she heard he had checked himself into an Arizona rehab clinic for prescription drug addiction. Robbie was admitted to The Meadows centre on Tuesday, his 33rdbirthday.Victoria's former bandmate, Geri Halliwell - who Robbie once dated - is also believed to have sent her love and best wishes to the depressed star.Other showbiz friends showing their support for Robbie include singer Kylie Minogue - who he duetted with on hit single 'Kids'. It has been alleged Robbie is hooked on anti-depressants Seroxat and Xanax, and the painkiller Vicodin.The 'Rudebox' star is also said to get through 36 superength double espresso coffees, 20 cans of Red Bull and 60 cigarettes every day.The huge doses of caffeine have left Robbie crippled by insomnia.