One of them shows her wearing thigh-high leather platform boots.
Lohan also bares cleavage in a denim top in a fourth image.
The pics were posted days after she made headlines and drew mockery over an Instagram post of an image bearing the words "You're an ass [donkey]" in Arabic [pronounced "Enta homaar"] and "You're beautiful" in English.
She responded to the online goof on Thursday, in a promotional Instagram post for a Valentino handbag.
"FYI- The funny thing is-the Arabic photo I posted was an inside joke w/friend to test my Arabic w/out Google translation," Lohan said. "So, was already known what it was."
On Friday, she also posted this tweet.
A for #effort pic.twitter.com/ejnDQLyvmE
— Lindsay Lohan (@lindsaylohan) April 24, 2015