Miranda Lambert was the belle of the ball in a new bob at Monday’s private ‘50s-themed party for “Automatic” in Nashville. Miranda turned heads with a shorter new 'do and a frilly vintage dress, celebrating her latest number-one hit with co-writers Nicolle Galyon and Natalie Hemby. VIP guests were encouraged to dress in vintage sock-hop attire and noshed on burgers and mini Oreos. Miranda was also in Nashville for closed rehearsals for the upcoming Platinum tour. The trek kicks off on July 10th in Fort Loramie, Ohio.