Anyways, I'm not Nigerian so I'm just gonna throw in my 2cents.
Generally speaking some of you are right, English is indeed not Nigerian's mother language.
However, it has become an Official language across many West African nations.
That grammatical error which was made by your First Lady, well... I can understand where both sides are coming from.
Personally, her grammatical error is not pardonable but, it doesn't go without saying that even the intellects and prominent icons in our generation are flawless. We all make minor mistakes but, who is to define what "Minor" is?
Theoretically speaking, It isn't a minor fault. What cracks me up though is how we suddenly have English Literature Professors all over this thread. lol.
Can each and everyone of you deem yourself a flawless English speaking type? Heck, I'm sure you aren't even pros in your own native language *ROFL*
Admittedly, it is a bit embarrassing considering the undeniable fact that she's on National TV...
But hey LOOOOK!! News Flash ex-US President Bill Clinton's scandal with Monica is hardly brought up.
If a renown character such as Bill Clinton can be overlooked then, how much more for a FirstLady that is or even might be unknown by many other nations.
You stir up something soo little, ridiculing her on the internet doesn't help either

Imagine over 100 visitors viewing this thread from USA/UK or any other country.lol. You would have sold your own Leader out, if not already...
Your FirstLady is no better than any of those species out there.LOL.
Just a simple human with the tendency and likeliness to make mistakes.
Hola!