Singer Christina Aguilera isn't shy of flaunting her baby bump.

The singer, who is expecting a baby with fiance Matthew Rutler, flaunted her baby bump in a form-fitting black dress at the KIIS FM Wango Tango concert in Carson, California, reports eonline.com.

The 33-year-old paired her dress with platform pumps and wore her blonde locks tied up well.

Aguilera is already a mother to six-year-old son Max, with former husband Jordan Bratman.