EMMA’S NEW ROLE: BaubleBar has tapped actress Emma Roberts as its latest Guest Bartender, with a collaborative 19-style collection launching on baublebar.com today that will retail from $18 to $150. The Guest Bartender as Told by Emma Roberts is the e-tailer’s largest campaign yet — and will see multiple deliveries over the next three months, with an additional 10-piece holiday assortment rolling out in early November. Campaign imagery featuring Roberts will support the line — as well as e-mail marketing outreach and a dedicated social media hashtag, #AsToldByEmma. “I have a love-hate relationship with social media, but mostly love,” Roberts said, adding that she will help promote the new collection via her Instagram account, where she has more than two million followers. According to Daniella Yacobovsky, BaubleBar cofounder, the company is on track to grow its top line by three times over 2013.