Some women notice changes in their energy level, mood, or breasts -- a lot like having PMS. Other signs might take you by surprise, like fainting, a shift in your sense of smell, or more bathroom visits. Your changing hormones kick into gear, even before you take that pregnancy test.
Most Billboard Hot 100 No. 1 Hits By Artist. The top spot on the ranking of the artists with the most No. 1 Hot 100 hits hasn't changed in 45 years, with the Beatles (20 leaders, tallied in 1964-70) fending off closest competitor Mariah Carey (18). Notably, Rihanna has entered a tie, with Michael Jackson, for the third-most Hot 100 No. 1s (13), all since her first, SOS, in 2006. See the All-Time Charts: Billboard 200 Albums | Billboard 200 Artists | Hot 100 Songs | Hot 100 Artists.
Usher became the first artist to top the Billboard Hot 100 Airplay with four consecutive number-one singles, In September 2004, My Boo, a duet with American singer-songwriter Alicia Keys, also peaked at number one at the Billboard Hot 100, becoming the album's fourth number-one single.