B Visa

An Australian Musician that is wanting to come to US for a few weeks to travel and play at approx 15-20 venues across the US. I am willing to sponsor him via my DJ entertainment service, and he will be paid for the shows. He is a professional musician in his country, has been for 15 yrs.
Which visa would be required in this case?

I have a 5 year multivisa. I visited US for two weeks 4 month ago. Now my friends invite me to stay longer than 2 weeks (2-3 months) and I dont have a job now. Can you please advice how long can I stay in US with this visa?

My cousin has invited me to his wedding, and I got married October 31 2009. The thing is this - my current passport is not in my married name, can I just apply for the visitors visa with my current passport and bring my marriage certificate as proof of marriage? My current passport will be expiring in 2012.

I am a holder of a US tourist Visa which will expire on July of 2011. I will visit the US on March 2011 to attend a wedding. If I go I will only have 4 months visa validity. Can I still use it with less than 6 months valid stay? I will stay only for 2 months the most.

Can a friend co-sign for me to bring my brother to the United States, I have green card and i don't make enough money. I just want to know if a friend can co-sign for me.

I am a US citizen can I apply for green card for her while she is in US and can she stay here while the application is in process?

I got my parents Visitor Visa stamped when I worked for Company A . But now I work for company B and I am planning to get them to US now. Do they need to go for stamping again?

I am american citizen, I wish to invite Egytian CEO for visit to U.S. since my dad is dying of pancratic cancer stage 4 and he wish to see him . Unfortunatly, he is stating. I need to provide documentation or application for B-2 visa. What is exact requirment for B-2 Visa? He has his own companies and I own a building in Texas and have bank account. We are both financially solid.

I got married to a US citizen in Mumbai under the Special Marriage Act about a month back. He is currently in the US and I am also planning to immigrate there with him. I have a tourist visa & am planning on going to the US on that visa and then apply for change of status. Will it be ok to do that? & once I apply for change of status, am I allowed to stay in the US beyond the regular tourist visa timelines (meaning the stamp given at the immigration counter at the airport showing the last permissible date of stay in the current visit)?