Get ready for a new dunking experience! Oreos is launching two brand new flavors this weekend: cookie dough and marshmallow crispy.

Announced this morning on "Good Morning America," the cookies will be available at grocery stores next month. But, to snag the new snacks early, viewers can tune into the Grammy Awards this Sunday to find out a special hashtag revealed during an Oreos commercial. With the hashtag, fans can Tweet for the chance to score the snacks before they hit the shelves.

These limited-edition flavors will debut to the music of Tegan & Sarah, who sing the track for the commercial.