Answer:
We do not really know when she lost her virginity, but in her Stripped Intro Part 2 she says: Sorry I'm not a virgin, Sorry I'm not a slut.. So that might be a clue that she lost her virginity before 2002 [when Stripped came out], considering how pure and honest the lyrics are in that album. It might also be a metaphor, so it's a bit confusing - there are lots of side for such story.
she would have lost her virginity before 22. her first love was jorge, could have lost it to him