Garageband just crashed! What do I do?
From your iPad Home screen, double-press the iPad Home button (press it twice in quick succession). The apps that are currently running will appear at the bottom of your iPad screen. Tap and hold the GarageBand app icon for a couple of seconds until you see the red "minus" symbol appear in the upper-left corner of the icon. Tap the red "minus" symbol to close the app. Then, double-tap the Home button again and reopen the app from your Home screen.