If you are taking tamoxifen to reduce the risk of breast cancer, or if your cancer is limited to the milk ducts (ductal carcinoma in situ-DCIS), then discuss the benefits and risks of taking this medication with your doctor.
The Beatles gained 17 number ones, but their first single to make the Top 40, Love Me Do, in 1962 peaked at number 17. 1.89 million. The number of copies sold of She Loves You, the band's second number one and the single which made them an international hit.
If you check out The Beatles album 1, as in one, it's an album of all their number one hits. There's 27 songs on the album. I did a quick search and found information that The Rolling Stones had 8 number one songs. The site is Askville, probably not the most reliable site on earth? But, it should give you a close idea.