If diamonds are a girl's best friends, then sparkles must have been in the running for the title. No need to buy a one-time dress for that formal summer invites. The Wet Seal tank dress, about $20 at wetseal.com, can be dressed up with a big dose of razzle-dazzle. Throw on a sequin jacket or bolero. We love this cropped jacket, $99, spiegel.com. Scrunch up the sleeves to show off a bold silver cuff, $4, charlotterusse.com. A strappy pair of purple stilettos, about $90 at stevemadden.com and danling beaded earrings, about $15 at target.com, will finish off the look. The bolero is an easy to mix accessory too. Wear it by day with a pair of oversized baggy jeans and a silver chain to stay on trend.