This website is so easy to use. All they ask is for you to create another 'fake' Instagram profile with atleast 5 photos and they'll give you 200 likes on each photo. You don't need to give them your password or anything suspicious. Also, I believe that they're making a feature to get followers too! (PS If you sign up it would be really nice if you said 'JoanneSheppard' referred you)
This is an app on my Iphone (although I think there's an android app too). Basically you like a persons photo and you get a credit for it which can be exchanged into likes. I know there are other websites online like this but this app makes it very quick and easy. The only problem is they put a limit on how many photos you can like an hour unless you pay. It's still so good though!