Count Dracula’s worst nightmare has come true: His new grandson may not be a vampire. The only solution is to put the little nugget through monster-in-training boot camp. Oh, and to have him listen to Fifth Harmony songs, because the group has a new track in “Hotel Transylvania 2.” The Huffington Post and its parent company, AOL, have the sequel’s exclusive new trailer, which features an introductory message from 5H. The movie opens Sept. 25.

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