The 'Boys and Girls' singer admits she struggles to keep in touch with her celebrity friends because she constantly misplaces her belongings, which contain their contact details.
She said: "I lose my phone all the time, so I haven't built up my phone book as much as I could have! At the moment, I have Frankie Sandford's, Marvin Humes from JLS', Tinchy Stryder's and Ke$ha's.
They're all good friends of mine."
Despite her forgetfulness, Pixie insists she is a good friend and recently treated several of her pals to a holiday to thank them for their support.
She added: "I took a couple of my best friends skiing in France in March for a week. I haven't been that extravagant with money, but that's the most I've ever spent!"
However, the teenage star is unlikely to win over any new pals with her culinary skills.
She admitted: "I don't really cook, but I do heat up tomato soup very well! That's my speciality."