The polka-dot-wearing actress makes a cheerful arrival to the Late Show with David Letterman. Plus: Blake Lively, Gavin & Gwen, Nick Jonas and more

DRIVER'S ED

With a little guidance from his bodyguard, Nick Jonas – who recently celebrated his 16th birthday – tests out his driving skills behind the wheel of a Mustang in his Toluca Lake, Calif., neighborhood on Monday.



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