Pop star Selena Gomez had Bruins support at her concert at the TD Garden Saturday night. Huddled up backstage were local hockey guys Reilly Smith, Jordan Caron, Brad Marchand, Adam McQuaid, and Dougie Hamilton. Gomez also took photos with fans and posted them on her Instagram page, captioning a big group shot, “Wicked awesome.” The “Come & Get It Singer” will be back in town Dec. 14 for Kiss 108’s annual Jingle Ball at the Garden. The lineup, which was announced Friday, also includes Miley Cyrus, Fall Out Boy, Robin Thicke, Flo Rida, and Enrique Iglesias.Mark Shanahan can be reached at email@example.com. Follow him on Twitter @MarkAShanahan. Meredith Goldstein can be reached at firstname.lastname@example.org. Follow her on Twitter @MeredithGoldste.