Age is everything — and it’s even more important on The Real Housewives of Beverly Hills. Over the course of the show, we’ve been introduced to 10 different fabulous ladies, all of them varying with their age. After four seasons, who’s the oldest of the bunch?

Wetpaint Entertainment asked Viggle users that exact question during the March 17 episode of The Real Housewives of Beverly Hills — and the results are in.

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Voters overwhelmingly voted for Lisa Vanderpump as the eldest housewife, with her snagging 79 percent of the vote. While this is the correct answer, you might be surprised to learn that she’s only edging out another lady by just one year. Adrienne Maloof, who got 15 percent of the vote, is just one year Lisa’s junior, with her coming in at 52 years old and Lisa being 53. Only 6 percent of voters thought that Kim Richards, who is only 49, was the oldest. Good job sleuthing, you guys!

Do you want to test your TV knowledge? Not only is it easy, but you also get rewarded just for watching your favorite shows! All you have to do is download the Viggle app, get watching, and check into Viggle LIVE!

The Real Housewives of Beverly Hills airs Monday nights at 9 p.m. ET on Bravo.

Carson Blackwelder is an Associate Editor at Wetpaint Entertainment. Follow him on Twitter and Google+!