Selena Gomez's Baby Sister's Name Revealed on Twitter: 'Come and Get It' Singer Done With Justin Bieber After Miley Cyrus Flirting Pics?

Kim Kardashian and Kanye West weren't the only ones to say hello to a new baby this week. Selena Gomez's mom Mandy Cornett and stepdad Brian Teefey also welcomed a baby girl earlier this week. The name of the new baby girl was a mystery up until recently when the "Come and Get It" singer spilled the news via her Twitter. On Friday, Gomez tweeted, "Momma, Brian, and me are all so grateful for all your well wishes. My lil sissy Gracie Elliot Teefey was born on June 12th. Luv you all XO."

So there you have it, Selena has a baby sister named Gracie Elliot. Demi Lovato was one of the first to congratulate Selena on the good news via Twitter. Lovato tweeted, "@selenagomez IS A BIG SISTER!!!!!! Everyone congratulate her and her family!!!!!! #CONGRATSSELENA!!!!"

In other Selena news, it sounds like her relationship with Justin Bieber could finally be over.  According to sources with Radar Online, Selena has had with Justin and the final straw were photos proving that Bieber was flirting with Miley Cyrus. The source told Radar, "She's finally taken some of their advice to heart and swears it's finally over with him, for good." The sourced continued by saying, "She doesn't see herself getting back together with him and just needs to move on."

According to Hollywood Gossip, Miley denied anything happening between her and Justin. However, Miley and Justin are not exactly known for making the smartest decisions. It sounds like Selena may have finally had enough of her drama with Justin, whether he hooked up with Miley or not.