Justin Timberlake arrives at the premiere of "In Time" in Los Angeles. (Matt Sayles/AP)

Sometimes these interviews involve pop quizzes — about your own life.

That was the case on Thursday’s “Today” show, where the musician turned actor was asked to complete the lyrics to ‘N Sync’s “Tearin’ Up My Heart” and to name how many times he’s hosted “Saturday Night Live.”

Spoiler alert: He did pretty well.

Then Timberlake turned the tables on Matt Lauer, who may need a refresher course on his past.

Watch the interview, with quiz section beginning at around 4:27, below.

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