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Selfie Showdown: Vote on Zac Efron's hot ride and Sarah Michelle Gellar's flight of fancyby Chris Serico
Hollywood#selfieshowdown

Circa's weekly series Selfie Showdown returns with Instagram photos of Zac Efron and Sarah Michelle Gellar, who snapped away while enjoying the splendors of transportation.

Efron flexed while enjoying a sweet Dubai ride and a sandy backdrop.

Elsewhere, Gellar appeared to find herself flying the friendly skies.

VOTE | Whose Instagram pic deserves to win this week's Selfie Showdown: Zac Efron or Sarah Michelle Gellar?

Quiz: Why aren't you Instagram famous yet?
You really should be a bigger deal on Instagram.