Aries: They're having a competition with Aquarius on who could stay up the longest.
Taurus: They needed to finish their book.Gemini: They where texting their friend all night and didn't want to stop.
Cancer: They are the only one that had a good nights sleep. ENVY ME ~ A word from Cancer
Leo: They couldn't handle their fabulousness, so they couldn't fall asleep.
Virgo: They where either studying or they just didn't feel like falling asleep.
Libra: They wanted to enjoy the night, so they stayed up.
Scorpio: Their nightmares woke them up.
Sagittarius: Because they just couldn't fall sleep. (They would if they could)
Capricorn: They where up playing video games.
Aquarius: They're having a competition with Aries to see who can stay up the longest, and so far, Aquarius in in the lead.
Pisces: Texting Gemini, but was too afraid to say bye to them and just go to sleep.