Pregnant pop star Christina Aguilera celebrated the impending birth of her second child with a baby shower in Los Angeles on Saturday (12Jul14).

The Beautiful hitmaker and her fiance Matt Rutler invited around 50 close friends and family members to mark the occasion at an adults-only party at her stylist's home.

Aguilera, who topped of her all white outfit with a floral headpiece, was presented with a cheeky cake decorated with icing made into the shape of a naked woman giving birth to a baby on a hardwood floor.

A message alongside the graphic image read, "Push Xtina, push".

The couple is expecting a baby girl together.

Aguilera is also mum to six-year-old son Max, from her first marriage to Jordan Bratman. They split in September, 2010, months before the singer met production assistant Rutler on the set of her 2010 film flop, Burlesque.