It's common knowledge that Gwen Stefani [1], a living, breathing antiaging campaign [2], hasn't let the unfortunate news of her split from Gavin Rossdale [3] get her down. Still, it must've felt incredible for Gwen to perform "Used to Love You" [4] — an emotional breakup ballad inspired by her ex — on The Voice on Monday, all while looking like she just got off an elevator straight from heaven. Surrounded by flowers and fog while wearing a white, gauzy Grecian-inspired gown, she delivered a beautiful rendition of her hit song. Watch her performance above, and then check out what she had to say about fellow The Voice coach and new beau Blake Shelton [5]!