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Lindsay Lohan is in Hawaii on a beach vacation approved by her probation officer, according to TMZ.

According to the terms of her probation, Lohan is allowed to travel, but only with permission from her probation officer.

Lohan's probation officer was apparently impressed by the fact that she is ahead of schedule in her court-ordered morgue duty and psychotherapy sessions, sources told TMZ.

Lindsay Lohan had hoped to reveal her first-ever Playboy cover during an appearance next week on "The Ellen Degeneres Show," but as with most things Lohan, this, too, did not go according to plan.

The sexy cover shot was leaked online Tuesday on the website The Insider.com. It shows Lohan, in just a pair of black heels, straddling a red plastic chair in the shape of Playboy's iconic bunny to strategically cover her up. The "Mean Girls" actress runs her hands through her long blond cascading hair.

"I think the Lindsay Lohan pictorial is spectacular. I couldn't be happier," tweeted Hugh Hefner, who called Lohan's issue a "true Collector's Edition."

"Lindsay Lohan was the top search name on the Internet yesterday. Her issue goes on sale late next week. Hot. Hot. Hot," wrote Hefner on Twitter.

CLICK HERE to See the Leaked Cover Image

Lohan will offer a more detailed look when she sits down with Degeneres Dec. 15, which will be her first media appearance since she served 4½ hours in jail for violating her probation.

Her appearance comes just before of the January/February issue of the men's magazine hitting newsstands.

Click here to see a slideshow of Playboy through the years.

ABC News' Luchina Fisher contributed to this report.