Taylor Swift: Birthday Girl, By-The-Numbers
Taylor Swift: Birthday Girl, By-The-Numbers

Taylor Swift claims her sixth No. 1 and completes her second set of two straight leaders on Country Songs, as "Ours" piles 34.1 million audience impressions and steps 3-1 in its 17th chart week. Her slowest chart-topping climb was noted when previous leader "Sparks Fly" needed 19 weeks to peak last fall, and her quickest pace was a nine-week climb with "Love Story" nearly four years ago.

Swift clocked two previous leaders in 17 weeks, starting with her first No. 1 "Our Song" in 2007, and two years later with "You Belong with Me." She achieved her first pair of back-to-back No. 1's three months apart when "Story" followed "Should've Said No" in November 2008. Top audience contributors during the tracking week for "Ours" are WUSN Chicago (1.3 million impressions), KKGO Los Angeles (1.0 million), WYCD Detroit (768,000), KEEY Minneapolis (747,000) and WKLB Boston (717,000). In its 19th week on Country Digital Songs, "Ours" ranks at No. 13 with 30,000 downloads, according to Nielsen SoundScan.

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Elsewhere on Country Songs, Lee Brice wears the Greatest Gainer crown for a second straight week with "A Woman Like You," which gains 3.6 million impressions and shoots 9-5. On Country Digital Songs, the track bullets for a fourth straight (fifth cumulative) week at its No. 3 peak, moving 48,000 downloads during the tracking week.

Also noteworthy in the upper tier, Rascal Flatts logs its 27th top 10 with "Banjo," which gains 900,000 impressions and hops 9-11 in its 10th chart week -- it introduces the trio's next album, "changed," due April 3. The album's title track opens with 57,000 downloads at No. 2 on Country Digital Songs.

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Miranda Lambert's "Over You" also helps freshen up the radio top 10 with a 12-10 jump in its 13th chart week, marking her sixth song to compete at that level. She's reached the top 10 three times in fewer weeks-her quickest was 10 weeks with "The House That Built Me" two years ago, a feat she repeated with "Baggage Claim" last October. She cracked the top 10 in 11 weeks with "Heart Like Mine" a year ago.

Also noteworthy on Country Songs: Following a No. 10 peak on the Hot 100 last fall, Kelly Clarkson's "Mr. Know It All" gets traction (48-44) with unsolicited play at three of the 130 stations monitored by Nielsen BDS for the country list. The song enters Country Digital Songs at No. 21 (17,000 downloads)

On Country Albums, Shooter Jennings logs his highest debut ever with "Family Man," which opens at No. 10 (8,000 copies sold). He posted his previous best rank with two albums, both of which peaked where they bowed at No. 12: "Electric Rodeo" (2006); "The Wolf" (2007).

Singer/songwriter Logan Mize draws his first national chart ink with "Nobody In Nashville," which debuts at No. 49 on Country Albums and No. 15 on Heatseekers (approximately 1,500 copies sold, according to Nielsen SoundScan). Although he's unsigned as an artist, he's a staff writer at powerhouse independent publisher Big Yellow Dog in Nashville. The new set is Mize's second full-length, self-released project, and follows his eponymous 2011 debut album. He is a native of Kansas, and a distant relative of well-known 1960's west coast country musician/television host, Billy Mize. The younger Mize has club and theatre performance dates booked through May.