If you didn't know to look for it, Alexa Vega's new stunner of an engagement ring might go unnoticed in the Instagram photo posted by her fiancé, Carlos Pena.
The "Spy Kids" actress and Big Time Rush singer appear to have gotten engaged during a romantic road trip over the weekend. The enamored singer shared the photo of his lady love leaning in through the open window of the car, iPhone and Starbucks beverage in hand -- not to mention the lovely sparkler on her ring finger.