Party pals Lindsay Lohan and Lily Allen get matching tattoos at 2am but shhh.... they're just like Rihanna's



At 2am, after a long night of partying, it probably seemed like a brilliant idea.

But in the cold hard light of day, Lindsay Lohan and Lily Allen may well be regretting their decision to get matching ink at a LA tattoo parlour in the early hours on Thursday.



Not least of all because it turns out their secret pact to both get Shhh... etched across their index finger was completely unoriginal.



It turns out pop star Rihanna has exactly the same scrawling on her right hand.

Hollywood's worst-kept secret: Lindsay Lohan revealed her Shhh... tattoo while on a shopping spree in Los Angles yesterday



Keep it quiet: Lily Allen showed Twitter fans her matching ink yesterday



She had it first: Pop star Rihanna

Lily, 23, and Lindsay, 22, made a late night visit to Shamrock Tattoos in West Hollywood after living it up at celebrity haunt Chateau Marmont.

It was an impromptu moment of bonding for the pair, who have been friends for some time after being introduced by music producer Mark Ronson.

Ronson is, of course, the brother of Lindsay's girlfriend Samantha.

Lily, who is clearly not adverse to mixing business with pleasure, is in America promoting her new album It's Not Me, It's You.



She has appeared on a string of talk shows during her Stateside visit, including the Tonight Show With Jay Leno and most recently, the Ellen DeGeneres Show.



She even took part in the 'Ellen's Bathroom Concert Series' skit, where stars join the host in singing a pop tune in a small studio bathroom.

Late night inking: Lindsay and Lily visited a West Hollywood tattoo parlour at 2am on Thursday morning



She performed a light-hearted duet of Britney Spears' hit Womanizer.

Lily is no stranger to the hit track - she got into hot water with executives at EMI Music Group after her unauthorized cover version leaked on to the internet back in December.

She also performed her single The Fear, which she is hoping will reach No. 1 on the American Billboard charts.



Lily is also gearing up for a sold-out North American tour that kicks off in April.

Lily's duet: The singer joined in a sing-along to Britney Spears' Womanizer with Ellen DeGeneres







Watch Lily Allen on the Ellen DeGeneres Show here...



