Fans of 5 Seconds of Summer are expressing their excitement Tuesday for the Australian boy band with personalized videos on social media. The band is performing at Rockefeller Plaza on Wednesday as part of the Citi Concert Series on Today. And ahead of the concert, Citibank, the Today Show, and Vivoom, a participatory mobile advertising app based in Cambridge, are encouraging fans to download Vivoom and engage in the social media marketing campaign.
