"Beautiful" singer Christina Aguilera named her newborn daughter Summer Rain Rutler this Sunday night. The singer-actress, who had just given birth to her firstborn with fiancé Matthew Rutler on Saturday in Los Angeles, is said to have named the latest addition to their family as Summer, after her favorite time of the year.

According to sources, Aguilera loves how her latest baby's name flows together and is happy about how she named her new bundle of joy.

Aguilera has a 6-year old son, Max Bratman (from her previous marriage with Jordan Bratman) and an E! News source, reportedly a friend of the 'Moulin Rouge' singer, says that the kid seems happy and excited about being a big brother to baby Summer. The source also said that Aguilera and Rutler constantly try to help Max feel included as their family expands.

The E! News source also added that luckily, Max is not too jealous of baby Summer and has even been helping his mom take care of her.

According to reports, Summer Rain Rutler already has a wardrobe to-die-for. Just as her mom is known for getting dressed up, the same thing is expected for the latest Hollywood baby.

Aguilera and Rutler first met on the set of the 2010 movie, 'Burlesque', which was also Aguilera's film debut, where Rutler was a set assistant. Photos of the two, which were released after Aguilera's divorce from Bratman, have revealed that they have been pretty close during the making of the movie, but Aguilera insisted that they only started dating after she had filed for divorce from her music executive ex.