用英语问明星要签名？？

may i have yr signature?
can u give me a signature?
hello , please sign here,many thanks
hey , bright star.can i get yr signature

你大点声音,亲切一点
让他们感觉到你的真诚~~~就OK了,其实那种场合他们懂的,他们知道你是要签名 不必多说什么 热诚一点就行咯

瓦赛!奥运村!好幸福啊!
Can you sign for me?是肯定不行的,不正宗,一听就是中国式英语
应该是
Can I please have your signature?
Can you sign this for me please?
Can you give me your autograph please?
Would you mind to sign this for me?
Would you mind to give me your autograph?

奥运村啊好羡慕啊 给科比要的时候这么说 kobe,could you give me an autograph ,thank you~

Could you sign for me?比较委婉一些
May/Could/Can I have your signature?
Could/May/Can I get your signature?

哇，我N羡慕你！！！
李阳教我说i have heard much about you, can you write something here for me .