SEE IT: Gwen Stefani Rocks Sheer Red Dress, Beau Blake Shelton is All Smiles

Talk about a hot date night. For their first official red carpet appearance together, Gwen Stefani and Blake Shelton attended the Vanity Fair Oscar party — and it's easy to see why they stole the spotlight. SEE IT: The 21 Hottest Looks From the 88th Annual Academy Awards The 46-year-old No Doubt singer and mother of three rocked a sheer red-hot dress by Yanina Couture, proudly showing off her perfectly sculpted physique and long, lean legs. And Stefani, who is known for her signature old-Hollywood-inspired beauty, kept her usual red pout and sparkling blonde tresses. As for her beau Blake? The 39-year-old country star kept things simple with jeans, a sleek black blazer and cowboy boots. It was also hard to ignore the smug smile he wore whenever the couple reached for each other's hands. PHOTOS: Gwen Stefani Has Not Aged Since 1996 According to US Weekly, Stefani and Shelton confirmed their relationship last November. See Stefani’s fiery look below: