Daisy and her alien fiancé Griffin are planning a big wedding, but not just any big wedding—the biggest wedding the universe has ever seen. Daisy has been settling into life on Griffin's home world of Kalesstria, running her own intergalactic music shop and planning for the big day. But things hit a bump in the road when there's a problem with Griffin's father—and it's a little more complicated than the usual disapproving dad drama. Looks like "save the date" is going to have to take a backseat to saving the universe...Marrying an Alien Pop Star is the perfect laugh-out-loud romantic finale to the beloved Alien Pop Star series.