The 18-year-old Lindsay Lohan/s younger sister, Ali Lohan wearing a camel sweater, skinny jeans and clunky boots while shopping in Westwood.

The 17-year-old reality TV star Ali Lohan stepped out in jumper that hugged her skinny frame while vacationing in Hawaii.

The 25-year-old actress Lindsay Lohan and her 17-year-old sister Ali Lohan take in the sights while on vacation together in Hawaii.

Dina Lohan has denied speculation that her 17-year-old daughter Ali has undergone plastic surgery or Botox treatments.

Rumours began circulating online last week after Ali, who recently signed a multi-year contract with NEXT Model Management, appeared in new photographs looking extremely thin with seemingly enhanced features on her face.

"They actually think I would let Ali get Botox or surgery? So beyond ridiculous. She grew three inches over the summer," Dina told The Huffington Post.

The 25 year-old actress Lindsay Lohan shows off her creamy legs in a jean shorts as she is enjoying a shopping spree at the Steven Allen showroom with little sister Ali.

Lindsay Lohan s porting a tight wetsuit as she hit the waves in Malibu, having fun in the surf and on the beach with her little sister, Ali Lohan.

Ali Lohan, joined by her sister Lindsay, was spotted sunning herself at her hotels pool in Miami, Florida.

Ali Lohan, 16, has modeled for sister Lindsay Lohan's 6126 clothing line's Spring / Summer 2011 collection in disturbing risqué attire.

It wasn't Ali's first modeling assignment for Lindsay, but it was certainly the most provocative. Ali not only exposed a lot of flesh, but also nude color undergarments through sheer lace garments.

The line - touted as "fashion forward but also really comfortable and of high quality so that they maintain their fit and look all day and night" - includes skimpy lace dresses, plunging tops and signature leggings.

She's been in the UCLA Medical Center's substance abuse rehabilitation center since being released from jail, and Lindsay Lohan is doing well.

Her mother Dina paid a visit to see her on Tuesday and reported that things are going "great" for her daughter.

LiLo will be in rehab for a total of 90 days, following her truncated jail sentence of just 13 of the 90 days she was sentenced to.

Mama Lohan told Radar, "I was finally able to hug my daughter [Monday night] after two long weeks of speaking to her from behind a glass wall. Lindsay is doing well, and is appreciative of the hundreds of well-wishes she has received."