What is the adverb for lovely?

We were considering this question tonight, after I praised me lovely's singing as lovely. It is not at clear what to do. "She sang lovely," has an innocent and uneducated feel but would be acceptable in SE English lower social class registers (think Eliza Doolittle in Pygmalion/My Fair Lady), and everyone would know what you meant.


Lovelily just don't sound right to me, though http://www.thefreedictionary.com/Lovelily defines this as "In manner to excite love; amiably."