A bit O fun...

I was looking through a clip art sight for images for a template and I came across a celebrity section. Anyway I thought it would be fun to see how many of the clip arts are recognizable. Here goes :
Two bonus points up for grabs if you can tell me how 3 and 4 are linked and 5 and 7. if your very clever you may be able to tell me what 1 and 4 have in common. =)
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Answers on Friday.