Also tying the knot the weekend were pop-star Brian McFadden and Irish DJ Vogue Williams.
The couple married in a romantic outdoor ceremony at the medieval castle of Castello of Vincigliata in Florence, Italy, on Sunday after making their official union at the Dublin registry office earlier last week.
Brian's ex-wife, Kerry Katona, was not present, but it is believed that their two daughters were present as bridesmaids. The rest of the Westlife singers were not present at the nuptials either.
Their guests, including Dannii Minoque, were treated to a five-course meal, followed by a band, DJ-set and fireworks display in the evening.
The wedding pictures are being closely guarded as it is believed a glossy magazine deal is in the pipelines.
Brian and Vogue have been dating since May 2011 and announced their engagement earlier this year.