Black Eyed Peas singer Fergie is convinced British pop star Robbie Williams will return "stronger" than ever following his recent stint in rehab. Fergie and Williams socialised together at a Los Angeles party last week (ends16MAR07). She says, "We've all faced our demons at some point. I feel I can relate to him. In this day and age it seems everyone is going crazy. "But Robbie is doing great. He's such a charmer. He'll come back stronger from all this. That boy knows how to pack out arenas." FEEL singer Williams completed a stay in an Arizona rehab clinic earlier this month (MAR07) to tackle his addictions to caffeine and prescription medicine.