Richard Lawrence Wolf.
Akon
The Jonas Brothers sing Hello Beautiful. It is on the album with their OTHER song Year 3000.
Dougie sings most of it but Danny sings some of it aswel
SNSD
Kenny chesney sings you had me from hello.
Paramore.
'Hello' by Martin Solveig
There is a group called "Three Weeks" that sings a song called "Hello, Mr. Gecko" on their "Alive Again" album. I'm not sure if that is the same song you are looking for. You can find them on myspace: http://www.myspace.com/threeweeksrock
Mr Bean sings Mr Bomtastic :D
Mr. and Mrs. (ex. "Hello, Mr. and Mrs. Evans" instead of "Hello, Mrs. and Mr. Evans")
The Beatles - Hello Goodbye
nickelback sings hero for spiderman movie.
The Beetles
I know it is Paramore
Michael mepurgo
James Taylor