Lance Armstrong: The disgraced cyclist lost his attempt to have the government's $100 million lawsuit against him thrown out of court.
Katy Perry: Her Grammy performance of her new song "Chained to the Rhythm" is getting mixed reviews on social media.
Nick Cannon: He's stepping down as host of America's Got Talent.
Rosa Mendes: The 37-year-old WWE star has announced she's retiring from professional wrestling.
Aqib Talib: The Denver Broncos cornerback celebrated his birthday while rumors floated that he might get cut from the team.
#Supergirl: Fans are reacting to the latest episode of the CW series.
#TradeValentines: Twitter users are coming up with political poems to mark the holiday.