Ke$ha has sex with ghosts….huh?

Usher was supposed to kick off his Euphoria tour in January, but now he’s postponed that until the fall of next year. He says he needs to take some time to focus on his sons — remember, he just won primary custody of 4-year-old Usher Raymond V and 3-year-old Naviyd from his ex-wife, Tameka Foster. Plus, Usher just signed up for “The Voice,” replacing Cee Lo Green in season four.

Last year, Daniel Radcliffe swore off the booze. He said he just found himself holed up in his home for days at a time and decided enough was enough. But that was SO last year. And there are pictures all over a Tumblr account to prove it. Apparently, Daniel was walking the streets of Dublin at 4am when he ran into a team of soccer players who were celebrating a big win. They invited Daniel back to their place to keep the party going and Daniel ended up sloshed.

Ke$ha is out promoting her new CD “Warrior” and she says the song “Supernatural” was inspired by her intimate relationship with a ghost. Yes, Ke$ha says she’s open to sleeping with ghosts, but just like the men she sleeps with in the living world, she doesn’t know his name.

Lady Gaga has probably been called worse, but probably not by a public official. Staten Island Borough President James Molinaro was launching his new Tackling Youth Substance Abuse program this week and he was talking about the influence celebrities have on kids. He pointed to a poster showing Lady Gaga smoking weed onstage in Amsterdam — where that stuff is legal, by the way — and said, “I would call her a slut. This slut is influencing many, many children…My niece has two daughters, 12 and 14…They LOVE this woman. Why? WHY?” Perhaps Mr. Molinaro is so emotional about the subject because his son died from a drug overdose in 2006. Gaga hasn’t made a comment…….yet.

“Us Weekly” says they’re already living together again but “People” is being a bit more cautious. They say Robert Pattinson and Kristen Stewart aren’t cohabitating again, but they are speaking. One or both of these magazines got it really, really wrong. But the source blabbing to “Us” says Kristen convinced Rob to take her back after writing him some bleeding-heart poetry. He’s a sucker for that stuff.