SIR Mick Jagger has sparked reports of an engagement to his longtime girlfriend L'Wren Scott, after the former model was seen showing off a diamond and sapphire sparkler on her ring finger at an Indian music festival over the weekend (27/28Oct07). The Rolling Stone rocker, 64, was in Rajasthan for a folk festival when the dark-haired beauty was spotted flaunting the striking piece of jewellery. But Jagger has continuously dismissed rumours of a wedding to his lover of five years, after his previous two marriages - to models Bianca Perez Morena de MACias and Jerry Hall - both ended in divorce.