While critics have responded positively to Britney Spears‘ comeback album ‘Blackout’, her record label Jive Records is reportedly finding it near impossible to promote the CD because the star is so unreliable at the moment.

An inside source told the New York Daily News: “They can’t get Britney to do anything! They did get her to do one photo-shoot for some promotional materials, but beyond that, they can’t trust her to even show up.”

“This album could’ve been so much bigger with Britney involved. This is the one opportunity they have to try and sell a million records. They were forced to [go on with] their marketing plan [without her].”

“They don’t feel they need her if she’s going to keep blowing them off. She’s already on the cover of every gossip magazine, and she’s on Perez Hilton nearly all day, every day for her antics.”

“Jive is just hoping to continue riding the Britney wave. The label can’t afford to waste their money hoping to get some of her time to help promote this. She’s too busy [hanging out] in a club somewhere.”

According to Entertainment Tonight, Britney was supposed to make an appearance at the Virgin Megastore in Hollywood for the midnight release of the album on Monday but drove away at the last minute when she couldn’t find a parking space near the store. She was later spotted partying at Winston’s with her close friend Sam Lufti.

An onlooker reports: “She kept downing [clear drinks] and danced sloppily all over the place with her sunglasses on.”