Why was Hilton upset on New Year's eve?

Socialite heiress Paris Hilton would have rocked her way into the New Year, but she was spotted looking extremely upset before New Year's eve as she had just...

Socialite heiress Paris Hilton would have rocked her way into the New Year, but she was extremely upset about losing her mobile phone just a day before New Year's eve.

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The 29-year-old looked mellow as she sat next to new boyfriend Cy Waits at a New Year's Eve party in Mexico, reports dailymail.co.uk.

"Just getting ready for bed. Had a mellow, but fun New Year's Eve. Hope everyone had a great night! HAPPY NEW YEARS! Love Paris. (sic),' Hilton posted on her Twitter page.

In an earlier post, Hilton complained about losing her phone.

"Friends - In case you texted me and I didn't answer, it's not cause I'm ignoring you. It's cause I lost my phone last night. So brutal. Sucks not having a phone on New Year's Eve. So since I can't text anyone. Just wanted to Twitter to you all HAPPY NEW YEARS! Love Paris. (sic)"