WESTLIFE star Nicky Byrne is celebrating following the arrival of his new niece, Lexi.
The singer (30) paid tribute to his beloved sister, Gillian Byrne on his Twitter site, after she and her husband, Mark welcomed their first baby girl into the world this week.
The tiny tot, who was due at the end of February, was born on March 5 and joins her older brother Zack in the close-knit family.
The Dublin singer explained how he has been busy spending lots of quality time with the latest addition to the Byrne clan this week.
"I just met Lexi. She is adorable," he posted on the networking site. "Huge congratulations to my sister Gillian and hubby, Mark on the birth of their daughter.
"A sister for Zack, it's brilliant news," he added.
Lexi's birth marks the second arrival of a new cousin for the Westlife star's twin boys, Rocco and Jay (2), in a matter of months.
Nicky's sister-in-law, millionaire author Cecelia Ahern, gave birth to her first child, Robin, last December.