Just Dance 3

Like most time sensitive achievements, you can adjust your system's clock to unlock this.

If you don't care about time stamps on xbox.com, unplug your Ethernet cord or wireless connection and play while not connected to LIVE. This way you can change the date and time to a Saturday after 8:00 PM. Turn on non-stop shuffle and let it run for 3+ hours.

If you want a timestamp, then you must play near this time. When connected to Xbox LIVE you can only change your Time Zone which should give you many hours of wiggle room. Adjust accordingly so you can get the achievement at your convenience.

this is much better earned offline. sign out of xbox live, disconnect from the internet, then go to the console settings and change the date to a Saturday night date, change the time to 8:30, start the game, play offline and go to non stop shuffle, if you dont wanna dance for 3 hours....dont, just start the session and you can then walk away or do whatever you want. i think the non stop shuffle ends at some point but im not sure when so if you are planning to go to bed like i did, just check and make sure the session is still going, if not, just restart the non stop shuffle. i also earned the "Super Dancer" bronze and silver and the "Singer" achievements. added perk