Blake Lively is in line to be Star Baker! The 33-year-old actress took to Instagram to show off her impressive flower-covered unicorn cake on her older sister, Robyn Lively's, birthday. «If I don’t get a handshake from @paul.hollywood after decorating this one, I quit,» Lively wrote after showcasing the detailed pink creation on Instagram. Paul Hollywood is a judge on, who is known for his discerning eye and palate.