Christina Aguilera is feeling, well, "Beautiful."
The pregnant singer shared a snapshot of her baby bump via Twitter over the weekend, which she dressed in a form-fitting blue dress. In the photo, Aguilera stands with her back against a wall and applies Eos' Mint lip balm. "Happy 1st Day of Summer!" she tweeted. "Keep those lips hydrated!" She also distributed the picture via Instagram and Facebook.
(Though the "Ain't No Other Man" singer, 33, does not have a formally announced partnership with the brand, it's the third time since April that she has promoted its products via her social media networks.)
Aguilera is currently expecting her first child with fiancé Matt Rutler, whom she met on the set of 2010's Burlesque. "I'm really excited to meet our baby girl," she recently told People. "This has been a very easy and enjoyable pregnancy." The four-time Grammy winner is also mom to Max, 6, with her ex-husband.