Gwen Stefani admits she 'never even knew' Blake ... fans couldn't believe how youthful she seemed as she had no blemishes or wrinkles on her face. Some claimed she appeared to be in her twenties ...

Gwen, who displayed a shockingly smooth face, was supporting the 48-year-old country singer as he hosted the Opry 100 special, which featured a bevy of country music legends paying tribute to the ...