Although the Grammys are cracking down on the show’s dress code this year, the after-parties are promising to be as wild as ever. Warner Music Group — which just snapped up Coldplay’s label Parlophone for $765 million — will take over Andre Balazs’ Chateau Marmont in LA tonight with expected guests including Carly Rae Jepsen, Bruno Mars, Blake Shelton, Flo Rida, Alessandra Ambrosio, Skrillex and Dita Von Teese. The Black Keys are also expected at the Mini-sponsored fete. For VIPs wanting to watch the awards away from the Staples Center (the better to make snarky comments about the competition), Universal Music Group head Lucian Grainge is throwing a private viewing party at his Brentwood home, we hear, hosted by industry bigs including Justin Bieber and PSY’s manager Scooter Braun and “American Idol” mentor Jimmy Iovine. Miley Cyrus, who surely will have trouble with any dress code, is expected at The Mondrian’s Skybar for a bash by Red Light Management. We’re also told Epic boss L.A. Reid and Universal Republic’s Charlie Walk are each throwing their own exclusive bashes.