Zoolander 2, AKA, Celebrity Cameo - The Movie, is not bad. A bit hit and miss, and not all the cameos really work (I'm not kidding, many of the jokes in this film revolve around, oh lets say, John Malkovich showing up for about five seconds). But the funny parts are pretty dang funny (Kristin Wiig's two joke character, the brutal murder of a widely hated pop star) and its tonally consistant with the last Zoolander but doesn't really feel like a tired retread.
So I dug it, no masterpiece, but it made me laugh. Best to watch with friends so you can all geek out about Benedict Cumberbatch's bizarre appearance together.