Blac Chyna. Picture: Instagram (@blacchyna)

In case you missed it, Blac Chyna's sex tape was leaked in February, and in the wake of it, Chyna faced all sorts of online criticism, including her fellatio skills.

After the sex tape surfaced, Chyna was slated by online users for her "performance" and called her efforts uninspiring and boring. Sex expert, The Head Doctor, rated their performance in an online posting - and let's just say - none of them got top marks.

Here’s a look at celebs that had their sex tape leaked online.

Paris Hilton

Famously called 1 Night In Paris, the 2001 video shows Hilton having sex with then-boyfriend Rick Salomon, who strategically released it shortly before her reality TV series "The Simple Life" made its debut.

Farrah Abraham

"Teen Mom" star Farrah Abraham swears the tape was filmed to "privately celebrate her awesome body forever".

In 2013 she teamed up with porn star James Deen, who admitted he was paid to film it. 

Pamela Anderson and Tommy Lee

The former "Baywatch" star and her ex Tommy Lee can be credited with starting the sex tape trend. In 1995 the couple made a tape while on honeymoon. To their shock, it ended up in the hands of adult entertainment company, Internet Entertainment Group.

Kim Kardashian and Ray J

It was the 2007 sex tape, featuring Kardashian and ex-boyfriend Ray J, that catapulted the reality star into the celebrity stratosphere.