ldelrey020212_09_X17.jpgLana Del Rey has decided to postpone her tour following her lackluster Saturday Night Live performance last month, according to sources for Fox News.

"[Lana] and her manager decided to cancel [the tour] after SNL," a source told Fox. "She was very upset." The tour was supposed to coincide with the release of her debut album, Born To Die, and even though it's number one in 14 countries (we bought it and can't stop playing it!), her live shows still need a little bit a lot of work. The source added, "They figure it allows time for her to clear her head, then go back to selling tickets. More importantly, they figure, the extra time gives them more distance from SNL."

Another source said Interscope's Jimmy Iovine and Del Rey's booking agents at CAA knew after SNL that she was not ready to tour and that live shows would actually hurt her record sales. "Jimmy knew if she would have disappointed again, it would have backfired," the source said.