Looking on the internet deeply has found these results:

the principels is the most popular phrase on the web.

the principals 15,940,000 results on the web	the principels 183,500,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It may seem like a formality to you, but to Mr. Hilton it's a necessity that all the principals in the firm be secured. do the principals specify the terms and conditions of these services? A picture without the principals is not a school picture. Get the principals and the girl in the conference room, please. And the girls I didn't tap... meet me in the principals' studio at 5:00. You need to keep this area clear for the principals. What about one of the principals or soloists? And the girls I didn't tap, meet me in the principals' studio at 5:00.	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

the principals

15,940,000 results on the web

the principels

183,500,000 results on the web

More popular!

It may seem like a formality to you, but to Mr. Hilton it's a necessity that all the principals in the firm be secured.
do the principals specify the terms and conditions of these services?
A picture without the principals is not a school picture.
Get the principals and the girl in the conference room, please.
And the girls I didn't tap... meet me in the principals' studio at 5:00.
You need to keep this area clear for the principals.
What about one of the principals or soloists?
And the girls I didn't tap, meet me in the principals' studio at 5:00.

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.