Noting that Biel, 31, recently admitted she loves "being able to say 'my husband,'" DeGeneres asked the "Suit & Tie" crooner, 32, what he likes most about his wife and their six-months-strong marriage. "I don't know," Timberlake began.
"Every once in a while I can catch a glimpse of her when she doesn't see me looking, and I have this moment where I'm like, 'If you never make a good decision ... if you only make bad decisions for the rest of your life. You made one really good decision.'"
After nearly four years of dating, the couple tied the knot last October in southern Italy at an intimate but star-studded bash. Continued Timberlake, "Because she's just like ... it's nice marrying your friend. It's nice to marry your best friend. It suits me."
DeGeneres agreed: "Yes, it does. It does suit you. I'm very happy for you."
The couple's most recent joint appearance was this past Monday, where Biel was Timberlake's companion at the Time 100 gala in New York. The magazine honored the singer-actor in its annual 100 Most Influential People in the World list.
Back in November, Biel similarly gushed to DeGeneres about newlywed life: "It's weird because it feels like almost nothing has changed, yet something that you can't really describe, or something that isn't tangible, has change. ... It just feels incredible."
MORE FROM WONDERWALL:
Justin Timberlake's boy band hairstyle