Poor Lindsay Lohan.

Just as her Sevin Nyne Tanning Mist was catching on (it's already a best-seller at Sephora), LiLo and her business partners get slapped with a lawsuit.

According to WWD, inventor Jennifer Sunday said she pitched the idea to Lohan and her partners this year, they entered into a confidentiality agreement and then La Lohan and co. bailed -- taking Sunday's trade secret with them.

You'd think these cosmetic endorsement deals would be a cakewalk, but this is actually just another example in a long list of beauty deals gone bad. Here are some of the uglier ones.

• Kate Hudson for WildAid Hudson and hairstylist David Babaii teamed up to create this socially conscious line of hair products and tools, but when the provenance of the line's volcanic ash formula came into question, out came the lawyers.

• Uma Thurman for Lancôme Thurman smacked the beauty giant with a whopping $15 million lawsuit when the brand made the expensive mistake of using her name and face in ads after her contract expired. (Lancôme said it was unintentional.)

• Teri Hatcher and Hydroderm After paying Hatcher $2.4 million to endorse its products, Hydroderm demanded a full refund (and then some). Why? The Desperate Housewife was touting its direct competitors' products. (That's so not cool.)

• Sharon Stone and Dior After Stone suggested China's devastating earthquake may have been the result of "karma," Dior's Shanghai office dropped the actress like a hot potato.