your 30 something SIL who is a 'beauty therapist,' (hence has access to every product and treatment under the sun) shopaholic, whom has a daily who cleans/irons. She doesn't cook (eats out) and has a personal trainer. She only likes pop music and only reads books by celeb's (she will prob get lots of copies of Posh's new book).
She has a tendency to be snobby so can't be anything obviously cheap,
Present needs to be no more than ?20 mark (She will prob spend 3x as much on me).
Only bonus is she will be spending her xmas hols in the Seychelles, so don't have to give it on xmas day