Nick Carter's wife has miscarried their second child.

The Backstreet Boys singer took to Twitter on Monday (10.09.18) to reveal he is ''heartbroken'' after he and his spouse Lauren Kitt - who already have two-year-old son Odin together - have lost their baby girl three months into the pregnancy.

He wrote: ''God give us peace during this time. I really was looking forward to meeting her after 3 months. (crying emoji) I'm heart broken. (sic)''

The 38-year-old star - who is currently on his South America and Mexico solo tour - was so cut up about the tragic news that he contemplated cancelling his concert in Lima, Peru, because he had only just found out a few hours before.

He tweeted: ''I don't think I can perform tonight. I'm sorry Lima. (sic)''

He then went on to reveal that his wife - who he married in 2014 - had been carrying a ''little sister'' for their son Odin and, although it would be ''hard'' to perform after such a devastating blow, he would go ahead with the concert.

He explained: ''It was a little sister for Odin... This will be hard, but for the love of my fans here in Lima I'll be on the stage tonight. (sic)''

Lauren previously revealed that her pregnancy with Odin had been riddled with complications and she was on eggshells until she reached the second trimester.

She said at the time: ''In the beginning of this pregnancy, we had complications and weren't sure if it was going to carry through. It was just first trimester complications that passed, but I didn't completely connect with my baby until I got later into my second trimester, because I didn't know what was going to happen.''

However, after he was born, the happy couple were head over heels in love.

Nick - whose sister Angel is currently expecting a baby girl - said of Odin: ''He's just a bundle of joy and it melts my heart and gives me purpose and reason to keep on staying healthy, staying motivated and all of those things. He's a really good, solid thing for me to have in my life.''