Adding photos from Instragram API to synchronized array in AngularFire - firebase

Question

I built a simple Instagram app using the Instagram API and Angular.
Now I would like to permanently store the users search (aka response from Instagram server for each hashtag entered) to Firebase.
I got the Instagram API call working and saved it as $scope.instadata but how do I add $scope.instadata to Firebase using $add()?
I'm getting err:
angular.js:11500 Error: Firebase.set failed: First argument contains a function..
var app = angular.module('InstagramApp', ['firebase']);
app.controller('MainController', function ($scope, $http, $firebaseArray) {
// search posts based on hashtag
function getHash() {
var base = 'https://api.instagram.com/v1/tags/'
var service = document.getElementById('hashtag').value
var apiKey = '####'
var callback = 'JSON_CALLBACK'
var url = base + service + '/media/recent?access_token=' + apiKey + '&callback=' + callback
// use jsonp method to prevent CORS error
$http.jsonp(url).then(function(data) {
$scope.instadata = data
console.log("returned json object: ")
console.log($scope.instadata)
// set up firebase reference
var ref = new Firebase('https://myapp.firebaseio.com/fbdata')
// create a synchronized array
$scope.fbdata = $firebaseArray(ref)
// add new items to the array RETURNS ERROR
$scope.fbdata.$add($scope.instadata).then(
function(p){
console.log(p.key())
console.log($scope.instadata)
},
function(err){
console.log("The expected Firebase action failed to occur this was your error: " + err)
})
}
 })
}
document.getElementById('hashtag').addEventListener('click', getHash, false)
})
It's my first time asking a question here, working with API's, Angular and Firebase! I hope that's ok!