Affiliate Marketing Secrets

I’m starting a YouTube channel soon where I plan to do makeup tutorials, beauty product reviews, updates on the latest /best priced items, etc & I wanted to do a “giveaway” (give away FREE nyx makeup) on instagram hoping to get more followers on instagram & promote my youtube page. One of the rules to enter would be to subscribe to me on YouTube & they must be following me on instagram. Then I would choose an end date for the giveaway & randomly choose a winner ! I would pay for the shipping also (giveaway would only be for u.s citizens only, not international)
My question is: is there any laws or regulations about me doing a online giveaway (100% free) using products that aren’t made by me ??? But I did buy them. Would I have to state that the items were purchased in store by me & not supplied by the company ? & that i am not affiliated with them in any way ??? I’m asking just to be on the safe side. I see it done allllllllll the time on instagram but before I do it, I just want to be sure that its legal
Pleaseeeee help !!! 🙁

I’m starting a YouTube channel soon where I plan to do makeup tutorials, beauty product reviews, updates on the latest /best priced items, etc & I wanted to do a “giveaway” (give away FREE nyx makeup) on instagram hoping to get more followers on instagram & promote my youtube page. One of the rules to enter would be to subscribe to me on YouTube & they must be following me on instagram. Then I would choose an end date for the giveaway & randomly choose a winner ! I would pay for the shipping also (giveaway would only be for u.s citizens only, not international)
My question is: is there any laws or regulations about me doing a online giveaway (100% free) using products that aren’t made by me ??? But I did buy them. Would I have to state that the items were purchased in store by me & not supplied by the company ? & that i am not affiliated with them in any way ??? I’m asking just to be on the safe side. I see it done allllllllll the time on instagram but before I do it, I just want to be sure that its legal
Pleaseeeee help !!! 🙁

I started a youtube channel a week ago, it is about makeup. I have already reached 250 subscribers. I noticed people with less subscribers (like 100-150) have been sent free products to review and giveaway. I have already signed up to be a sigma affiliate…and I tried to contact coastal scents, but got no response.
Do you know of any companies that would send me free products to review and maybe some extras for a 300 subscriber giveaway?
Thanks for the help!