Both Bollywood actors share their birthday on Jan 31 and Preity was present at Amrita's theme party Wednesday night.
'Amrita is a really sweet girl and has been inviting me every year for us to celebrate our birthday together,' Preity told IANS.
She added: 'This year I said I had to go. Besides, it was a theme party - wigs and hats. And I love hats. I'm a very hat person. So, I went in one of my favourite hats. Thank god I didn't wear the big blonde wig as I was planning to because the whole industry was there. How would I've looked?'
The fun-loving Aquarian side to Preity remains predominant.
'All us Aquarians are gregarious and hassle free. Maybe Abhishek (Bachchan), Urmila (Matondkar), Amrita and I can have a collective birthday party next year. We're all chatterboxes. But I'm now learning to listen more carefully.'
Preity, who is now pursuing a career in business as well by bagging the franchise of the Mohali cricket team in the Indian Premiere League, is trying to be a better listener.
'I have to be. I'm in all these board meetings for my cricket deal. And there I better shut up and listen. There's so much to learn,' she said.
Preity was in fact attending a series of meetings on the eve of her birthday.
'But on my birthday I've just decided to chill out. I'm at home watching a DVD, relaxing, sleeping. Last year was a sad birthday for me. My dog had died. This year I've lots to look forward to. And I'm happy. The only thing that irritates me is the constant reference to my age from media persons,' rued the actress.