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So what's with the bizarre tattoo, Yvonne?

OH DEAR... what was she thinking of? Yvonne Keating, the normally prim and proper former model, raised eyebrows among onlookers when she debuted a new tattoo at a charity event this weekend.

From the front, the mum- of-three, married to Boyzone star Ronan Keating (33), looked elegant in her flowing black gown with a high neck.

From the back, the view was a little more daring. The red tattoo features three spirals of ribbon that come together with the bow tied at the bottom.

Yvonne showed off her new look at Keith Duffy's charity dinner A Night For Love at O'Reilly Hall in UCD on Saturday night.

Other celebrity guests turning heads at the €500 a plate dinner was author Cecelia Ahern, Morah Ryan, Glenda Gilson and businessman Robbie Fox.

Around 400 people attended the glitzy affair, raising nearly €100,000 for Keith Duffy's charity, Irish Autism Action, and the foundation set up by guest of honour Samuel L Jackson.

A special performance by singer Dionne Warwick was considered one of the highlights of the event.

Valentine's weekend saw Yvonne support her husband's bandmates on two occasions as she attended the ball organised by Duffy and then jetted off to London to cheer on Mikey Graham for his Dancing On Ice performance.