Research Finds This Smell Makes People Happier? Impossible Trivia

This week on Lite Rock Impossible Trivia, you have the chance to win tickets to see comedian Russell Brand this Friday night in the Music Box at Borgata.

This morning's question: Researchers have found that this smell actually makes people happier.  What... is it?

We didn't get an answer this morning! Give me your best guess Tuesday @ 7:20a.m. to win two pair of tickets to see Russell Brand Friday night at Borgata.