Two songs that have reached No. 2 on the Billboard Hot 100 - so far - top a pair of Billboard's Nielsen BDS-based radio airplay charts.

Ellie Goulding ascends to the top of the Mainstream Top 40 ranking, as "Lights" (Interscope) rises 2-1 in its 23rd week. With its ascent, the song matches P!nk's "U + Ur Hand" (23 weeks, 2006-07) for the longest climb to No. 1 by a woman in the chart's almost-20-year history. Among all No. 1s, only Cee Lo Green's "F**k You! (Forget You)" (25 weeks, 2010-11) has logged a lengthier rise to the pinnacle.

"I would like to give my thanks to each and every person at U.S. radio who helped 'Lights' become such a successful -- and a No. 1 -- song," Goulding wrote in an industry thank you ad to stations. "I could not be more grateful for this journey and here's hoping that it can continue."

Katy Perry, meanwhile, extends her lead for the most No. 1s in the 16-year archives of the Adult Top 40 chart, where "Wide Awake" (Capitol) lifts 3-1. The song is Perry's seventh leader on the list, pushing her further ahead of Maroon 5, Nickelback and P!nk, each second with five toppers.

Perry has notched her record sum of Adult Top 40 No. 1s in just more than three-and-a-half years, having first led with "Hot N Cold" the week of Dec. 27, 2008.

On the Hot 100, which combines Nielsen SoundScan sales data and BDS-measured streaming information, in addition to BDS-monitored airplay, "Lights" and "Awake" have each risen to No. 2. On the Hot 100 released last Wednesday (Aug. 8), "Lights" jumped 5-2 in its 33rd week. The week earlier, "Awake" rose 3-2 (before slipping to No. 4 last week).

Will either "Lights" or "Awake" rule the Hot 100 this week? Or, can Carly Rae Jepsen log a 10th week at No. 1 with "Call Me Maybe"? (Flo Rida's "Whistle" could also work its way to the top, having climbed 4-3 last week). Find out Wednesday (Aug. 15), when highlights of the Hot 100 will post on Billboard.biz. All charts, including the Hot 100, Mainstream Top 40 and Adult Top 40, will refresh Thursday (16) on Billboard.biz.