She's been a rock music mogul, a heroin junkie and acclaimed historian of the renaissance. Now Leonie Frieda, 48, says she's learning to be a B-list celebrity. Frieda assumes the spotlight at 12.30pm today in the Dymocks ifc store to promote her acclaimed biography of Catherine de Medici. She has had plenty of tips on stagecraft from her boyfriend, the leading historian and notorious British networker Andrew Roberts, who is in town as star of four events organised by the Royal Geographical Society. 'We're the Little and Large Show,' Frieda told CitySeen. 'I'm almost six feet tall [1.83 metres] and he's nearly five [1.52 metres]. He's 40, I'm 90.'