Billboard compares the string of new albums from young singer Rihanna to other productive groups in the past, plus news on the troubles of Evanescence and Barbra Streisand's London run. Tell us what

Billboard compares the string of new albums from young singer Rihanna to other productive groups in the past, plus news on the troubles of Evanescence and Barbra Streisand's London run. Tell us what you think! Email us at InSixty@Billboard.com. You can also email Danielle Flora at Danielle@Billboard.com.