Yamla, the discussion about her being or not Portuguese has been going on since February. It is about time to put an end to it. Your concern as per WP:MOSBIO means what? Clarify yourself!

"Nationality (In the normal case this will mean the country of which the person is a citizen or national, or was a citizen when the person became notable."WP:MOSBIO

She has two nationalities.Full stop. There is nothing there against it. 

The thing is that your opinion is just POV, for you to sustain that she is predominantly Canadian you need to present sources that states so, I told you that before. Prove she is more Canadian than Portuguese. "she did not even apply for her Portuguese citizenship until relatively recently "  Where does it say she applyed for her citizenship recently? I only read she applied for her passport. Read the == Ancestry == section, she is Portuguese from birth. The Rolling Stone is the only source aproved by you? And all the other sources provided  you erased? Like the Portuguese-Canadian National CongressPortuguese-Canadian National Congress  The GuardianNelly Furtado, Loose
There is also The Times I added later: . 
And new ones for you:«"I think just growing up first-generation Canadian you're so aware of your identity," she said. "I had my identity as a Portuguese-Canadian. I was very aware, and I already had my ears opened  even singing in another language at such a young age  your ears are already opened to different sounds, different instrumentation, different cultures.»
["http://music.yahoo.com/read/news/12055995]

What about a Rolling Stone article?"And though this twenty-two-year-old Portuguese-Canadian singer-songwriter..." 

"Finally, I believe that stating she is Portuguese-Canadian implies that she is Canadian with Portuguese ancestry and such would not be permitted in the intro paragraph according to WP:MOSBIO." Is that so? where does it say  in the WP:MOSBIO that a nationality that implies ancestry is not permited? Are there invisible words I have not been able to read?  1-She has Portuguese ancestry because her parents are Portuguese.  Almost all Portuguese have Portuguese ancestry, that way all biographies of Portuguese people would not be permited. 2-She is a European citizen which means for EU countries only her Portuguese nationality is considered, that is, for legal matters.     

Jester7777 if the page was blocked because of your argument with Opinoso I did not read any discussion about it and it has been blocked for too long.  I just erased the comment about it on the request.