Mickey Mouse Clubhouse and When do you buy a big girl bed for your toddler?

Emmeline insists on having all of her Mickey Mouse clubhouse crew in her crib...
We have taken them out a few nights off and on but she always seems to want them back...
Hardly any room left for her in the crib!!
She will be 27 months on the 22nd of this month...is it too early to get a big girl bed?
I am in no rush for it..she usually sleeps good...we do have our moments...but...
Any advice?
I have googled etc...and it looks like they say keep the crib until 3...
I would like some "real" advice so if anyone is reading my blog...and anyone can weigh in...would appreciate it....ty... :)