Nicole Richie has fuelled speculation she is engaged to Good Charlotte singer Joel Madden after sporting a massive diamond on her wedding finger. The SIMPLE LIFE star stepped out for coffee on Wednesday (28FEB07) and was photographed with the large ring on her left hand. The pair visited Los Angeles jewellery store XIV Karats on 19 February (07) and looked at engagement rings. An employee from the store confirms to American publication Life + Style the couple looked at rings, but that Richie only ended up purchasing a ruby necklace for $3,350 (GBP1,795). The couple have only been dating for a few months, but are reportedly already house hunting together. The 25-year-old ended her engagement to ADAM 'DJ AM' GOLDSTEIN last year (06) and hooked up with Madden shortly after he ended his relationship with Hilary Duff.