09/16/2011 02:23 pm ET Updated Dec 06, 2017

Ali Lohan's First Appearance Since Plastic Surgery Rumors (PHOTOS)

It was a family affair for Dina Lohan's 49th Birthday Party at Beauty & Essex in New York on Thursday night.

It was also the first time Ali Lohan has been seen in public since rumors the 17-year-old model had plastic surgery and botox injections to achieve her new and very different look.

Rumorfix snapped some photos of the whole Lohan family, and birthday girl Dina, told the website, "Ali has never had plastic surgery. The rumors are totally false."

Both Dina and Lindsay defended Ali after rumors began to circulate. Lindsay turned to Twitter, declaring:

"I love how haters pick on my sister yet every runway model is just as thin! My sister is gorgeous and I'm so proud of her and her career!!!!"

According to Rumorfix, all four of Dina's children: Lindsay, Ali, Michael Jr., and Cody attended the intimate party of about 25 guests, and Lindsay gave her mom a Chanel gift bag as a birthday present.

The small party was the most uneventful night Lindsay has had this week. The troubled starlet has been in town for New York Fashion Week and managed to delay a fashion show and threw a violent tantrum at a party.

More photos of Dina, Lindsay and Ali here.