Download Aliens Stickers! for iMessages.

Tips of installing stickers:
• To access Messages apps, compose a new Messages to a friend and tap the Messages App Store icon alongside the compose field.
• Tap the four oval icon on the lower left corner to open the app drawer. From there, tap the plus icon ( '+') to access the Messages App Store.
• In the App Store, tap the Manage tab to add and see your apps to your app drawer.

How to use stickers:
• Open iMessage from your iPhone
• Select the your app's sticker
• Just with a single tap send stickers
• PEEL & PLACE stickers on top of message bubbles or photos, just tap, hold and drop!
• Layer stickers over each other in conversations in iMessage
• Scale & Rotate stickers by using a second finger before you place it on a bubble.