 It s a surprise when Maddie and London have their Sweet Sixteen parties on the same day, but Maddie tries to talk London out of it because it s her birthday and her grandma is flying across the country for it.Besides, London s birthday was six months ago.At London s party, there s a ton of party crashers, elephants, and fancy costumes.Then, London doesn t know what to do because her ex-parents both want her to be with them, but they don t want to be with each-other so London is running around all over the place and soon finds out, she s not having a great time like she planned.Maddie was also having a lousy time because her party was supposed to be great, but her little brother, Liam, needed braces so her parents used her party money so it ended up, Maddie s party was at the Goose Lounge. Only Zack comes and then they have some "suprise guests" so what will happen?