Doris Mann (Shirley MacLaine) sings "I'm Still Here"
definition of alluring
highly attractive and able to arouse hope or desire; "an alluring prospect"; "her alluring smile"; "the voice was low and beguiling"; "difficult to say no to an enticing advertisement"; "a tempting invitation"
beguiling, enticing, tempting
seductive - tending to entice into a desired action or state
And because these are my choices and I don't think there is anything sexier than someone who can laugh at themselves too - I have choosen here some singing scenes that are funny as well.
These are not in any specific order. If you have other great scenes in mind, please do tell! (Specially if you have some alluring men singing ;)) My first public list, so I'm quite excited to see what you think :)