Gaga: 5

Bieber: 0

Time on Twitter

Gaga: 4 years, 11 months

Bieber: 3 years, 10 months

Recent tweet

Number of tweets (as of Friday)

Gaga: 2,583

Bieber: 20,478

Not-so-secret secret

Gaga: Has 14 tattoos

Bieber: Infatuated with the color purple

Embarrassing-but-sort-of-impressive onstage mishap

Gaga: Got whacked with a pole by a backup dancer and kept on performing

Bieber: Threw up and kept performing