Lindsay Lohan has warned her younger sister to stay away from nightclubs if
she wants to be a star.

The 'Mean Girls' beauty - who completed a two-month stint in rehab last year
for drink and drug problems - is keen for aspiring actress Ali, 14, to avoid
all the pitfalls she endured.

She said: "I've urged her to keep her head on straight. She needs to stay
away from clubs! But I wish her the best of luck."

Ali - who recently admitted she was desperate to be famous in an interview
with Teen Vogue magazine - is set to appear in a reality TV show with mother
Dina.

Meanwhile, Lindsay insists she has recovered from her problems last year.

The 21-year-old star said: "I'm doing great. I'm really focused."

Lindsay recently bought a two-bedroom New York apartment so she can escape
the paparazzi.

Speaking about the high-rise property, she told US TV show 'Extra': "The
security is fantastic here, which I think is really important. It's hard to
have a private life and keep relationships and that sort of thing, but I had
four days off from them recently in Los Angeles and they didn't follow me at
all."

Lindsay Lohan shops at a vintage clothing store with Samantha Ronson in NYC (03/09/08).