Showbiz
Rex Features
Appearing on The Oprah Winfrey Show, the singer denied reports that he had proposed to Biel after attending a friend's wedding in Italy last year.
"I'm not engaged," he insisted. "If she's engaged, we have a problem."
When asked about the most romantic thing that he had done for Biel, he joked "pantyhose and a leotard", in reference to his skit on Saturday Night Live when he dressed as one of Beyoncé's backing dancers.
Discussing the actress's influence on his clothing line William Rast, he added: "She's obviously a huge muse for me. And with the designers too."
Timberlake and Biel, who have been dating since 2007, recently bought an apartment together in New York.
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