"Just Give Me a Reason" logs a second week at No. 1, while PSY sends his newest viral, and sales, hit, "Gentleman," into the top tier

P!nk spends a second week at No. 1 on the Billboard Hot 100 with "Just Give Me a Reason," featuring fun.'s Nate Ruess. PSY, meanwhile, soars 12-5 with "Gentleman," which adds increased streaming and sales to its already record-setting YouTube views totals.

"Reason" reigns on Digital Songs for a fourth week with 262,000 downloads sold (down 7%), according to Nielsen SoundScan. It advances, however, 4-3 on Radio Songs, up by 17% to 114 million all-format audience impressions, according to Nielsen BDS. On Streaming Songs, "Reason" backtracks 5-6, although with a 1% increase to 4.7 million streams, according to BDS.

While "Reason" is P!nk's fourth Hot 100 No. 1, it's just her second to lead for multiple weeks. 2001's "Lady Marmalade," with Christina Aguilera, Lil' Kim and Mya, dominated for five frames. (2008's "So What" and 2010's "Raise Your Glass" each spent a week at No. 1.)

K-pop star PSY blasts into the Hot 100's top 10 (12-5) with "Gentleman," which wins top Streaming and Digital Gainer honors following its first full week of availability. The song follows his breakout U.S. hit "Gangnam Style," which became the first video ever to reach 1 billion views worldwide. (It now stands at 1.6 billion.) "Gangnam" peaked at No. 2 on the Hot 100 for seven weeks last fall (before YouTube data began contributing to the chart) and has sold 4.5 million downloads.

"Gentleman" bounds into the Hot 100's top 10 fueled primarily by a 60% gain in streaming, as it tallies a second week at No. 1 on Streaming Songs with 13.9 million U.S. streams. It had registered 8.6 million streams in the U.S. in just shy of two days since its posting (on April 13) in last week's chart tracking period. (Now up to 216 million YouTube views worldwide [as of this posting], the song set the mark for the most views [18.9 million] for a video in its first day on the site, according to sources at YouTube, as previously reported. The Hot 100, however, counts only U.S. views in its weekly tabulation.)

"Gentleman" also debuts at No. 20 on Digital Songs with 72,000 downloads sold, a 167% improvement over its sum last week, which encompassed less than three days following its digital release on April 12.

Without official radio promotion, "Gentleman" is receiving only minimal airplay so far. Its 65 plays in the April 15-21 BDS tracking week rank it at the lower end of the 100 most-played mainstream top 40 tracks in that span.

"Gentleman" concurrently lifts 2-1 on Dance/Electronic Songs.

Below P!nk, Macklemore & Ryan Lewis claim the Hot 100's Nos. 2 and 3 titles. "Can't Hold Us," featuring Ray Dalton, rises 5-2 and "Thrift Shop," featuring Wanz, dips 2-3 after logging six nonconsecutive weeks at No. 1. "Hold" takes over atop Hot R&B/Hip-Hop Songs, after "Shop" led for 14 weeks, and the subscription services-based On-Demand Songs chart, which "Shop" topped for 13 frames through last week.

"Hold" reaches the top 10 on Radio Songs (13-8; 71 million, up 20%) and Streaming Songs (11-5; 5 million, up 42%), while spending a second week at No. 2 on Digital Songs (245,000, 17%).

Macklemore & Lewis are the first multi-member act to place two titles in the Hot 100's top three since the Black Eyed Peas did so for five weeks in June/July 2009. (Among all acts, Rihanna had last doubled up in the top three the week of Oct. 2, 2010.)

P!nk again wins a close race to the Hot 100's top spot, as approximately just 7,000 chart points separate "Reason" and "Hold," after "Reason" led "Shop" by about 4,000 points last week. With "Reason" up by less than 1% this week and "Hold" up by 24%, continued momentum could send the latter song to the summit next week.

Bruno Mars' "When I Was Your Man" falls 3-4 on the Hot 100 after crowning the chart two weeks ago. Still, it claims a fifth week at No. 1 on Radio Songs (142 million, down 5%).

Below PSY, Rihanna's "Stay," featuring Mikky Ekko, drops 4-6. As previously reported, the song this week becomes her record-setting 10th No. 1 on the Pop Songs airplay chart, pushing her past Katy Perry for the most leaders in the ranking's 20-year history.

Justin Timberlake's "Mirrors" (7-7) is the Hot 100's top Airplay Gainer. Impressively, the song completes his fastest trip to the Radio Songs top 10, vaulting 18-9 with a 36% gain to 70 million in its fourth week. Of his 11 prior top 10s on the chart, he'd previously roared to the top 10 in as few as five weeks with 2006's "My Love," featuring T.I., and his predecessor single "Suit & Tie," featuring Jay-Z.

"Mirrors" also charges 8-5 on Digital Songs (142,000, up 12%) and 10-9 on Streaming Songs (3.5 million, up 3%).

"Suit," meanwhile, descends 6-8 on the Hot 100 and passes 2 million sold to date.

Rounding out the Hot 100's top 10, Pitbull's "Feel This Moment," featuring Aguilera, retreats to No. 9 from its No. 8 peak and Drake's No. 6-peaking "Started From the Bottom" slides 9-10.

Just outside the Hot 100's top 10, Daft Punk notches its highest-ever rank, as "Get Lucky," featuring Pharrell Williams, launches at No. 19 with 113,000 downloads sold. The act had previously reached No. 61 with both 1997's "Around the World" and 2001's "One More Time." "Lucky" starts with just three days of sales, following its April 19 release, although its opening week sales still mark the duo's best frame. The pair releases its fourth album, "Random Access Memories," its first studio set since 2005, on May 21.

Check Billboard.com tomorrow (April 25), when all rankings, including the Hot 100 in its entirety and Digital Songs, Radio Songs, Streaming Songs and On-Demand Songs will be refreshed, as they are each Thursday.