Kelly Clarkson is pregnant.

The 'Stronger' hitmaker is expecting her first child with her music manager husband Brandon Blackstock - whom she married last month - and took to Twitter yesterday (19.11.13) to announce the exciting news.

She wrote: ''I'm pregnant!!! Brandon and I are so excited! Best early Christmas present ever :) (sic).''

The 31-year-old singer was forced to postpone a gig in Buffalo, Tennessee, on Saturday night (18.11.13) due to ''illness'', but it is now believed she was suffering from morning sickness.

The former 'American Idol' winner recently admitted that her and Brandon couldn't wait to have a baby together.

She said: ''We're trying, trying, trying ... like rabbits! I want a little baby with little feet and I just want to bite them.''

Brandon has two children from a previous relationship, Savannah, 11, and Seth, seven, who were the only guests at the couple's wedding on October 20, and Kelly said being a stepmother to the pair had made her more maternal.

She added: ''They're so great. I never wanted kids before, but now I want, like, five.''