Chart Highlights: Demi Lovato 'Attack's Pop Songs

Chart Highlights offers a sneak peek at a select group of Billboard charts every Monday. Find out the top songs, Greatest Gainers and debuts on the surveys listed below.

All our charts are refreshed on billboard.com every Thursday.

Pop Songs*** No. 1 (7 weeks)*** "I Knew You Were Trouble." Taylor SwiftGreatest Gainer No. 15 "Stay" Rihanna Featuring Mikky EkkoDebut No. 30 "Just Give Me A Reason" P!nk Featuring Nate Ruess

Debut No. 35 "Heart Attack" Demi Lovato

Demi Lovato blasts back onto Billboard's Pop Songs chart, as "Heart Attack" debuts at No. 35 following its first week of airplay. The song marks the first entry on the list for the singer/actress/judge on the most recent season of Fox's "The X Factor" since "Give Your Heart a Break" became her first No. 1 in September.

"I love Demi's new single," says Erik Bradley, APD/MD of CBS Radio's WBBM Chicago, which played the track 30 times in the Feb. 25-March 3 Nielsen BDS tracking week. "It's easily our most-requested song and has been from the first play. I feel fairly confident that it's going to be her second No. 1 single."

"Heart" previews Lovato's forthcoming fourth studio album. Industry sources suggest that the song could debut with 200,000 downloads sold when Nielsen SoundScan's latest figures are released on Wednesday (March 6) on Billboard.com, setting up a likely lofty debut for it on this week's Billboard Hot 100. Notably, the chart's leader the past wo weeks, Baauer's "Harlem Shake," also debuts on Pop Songs at No. 38 (see below).

Debut No. 38 "Harlem Shake" Baauer

Adult Contemporary*** No. 1 (7 weeks)*** "Home" Phillip PhillipsGreatest Gainer No. 16 "I Knew You Were Trouble." Taylor SwiftDebut No. 29 "Wrong Guy (I Did It This Time)" Whitney Wolanin

Adult Pop Songs*** No. 1 (1 week)*** "I Knew You Were Trouble." Taylor SwiftGreatest Gainer No. 27 "Just Give Me A Reason" P!nk Featuring Nate RuessDebut No. 40 "Closer" Tegan And Sara

D! ance/Club Play Songs*** No. 1 (1 week)***/Greatest Gainer "I Could Be The One" Avicii vs Nicky RomeroDebut No. 44 "Shake That" Gimm+IckyDebut No. 46 "Harlem Shake" BaauerDebut No. 47 "Thrift Shop" Macklemore & Ryan Lewis Featuring WanzDebut No. 49 "Acid Rain" Alexis JordanDebut No. 50 "Suit & Tie" Justin Timberlake Featuring Jay Z

R&B/Hip-Hop Airplay*** No. 1 (3 weeks)*** "Pour It Up" RihannaGreatest Gainer No. 6 "Started From The Bottom" DrakeDebut No. 45 "All That (Lady)" The Game Featuring Lil Wayne, Big Sean, Fabolous & JeremihDebut No. 47 "Take Me To The King" Tamela Mann

Rap Airplay*** No. 1 (6 weeks)*** "F**kin Problems" A$AP Rocky Featuring Drake, 2 Chainz & Kendrick LamarGreatest Gainer No. 4 "Started From The Bottom" DrakeDebut No. 21 "Power Trip" J. Cole Featuring MiguelDebut No. 22 "Feel This Moment" Pitbull Featuring Christina Aguilera

Rock Airplay*** No. 1 (1 week)*** "Radioactive" Imagine DragonsDebut No. 41 "Inhaler" FoalsDebut No. 48 "Vilify" DeviceDebut No. 49 "Demons" Imagine DragonsGreatest Gainer "Sacrilege" Yeah Yeah Yeahs

Alternative Songs*** No. 1 (3 weeks)*** "Radioactive" Imagine Dragons

Debut/Greatest Gainer No. 35 "Sacrilege" Yeah Yeah Yeahs

Last week's Billboard magazine cover act, the Yeah Yeahs Yeahs, debut on Alternative Songs at No. 35 with "Sacrilege," the lead single from the band's fourth album, "Mosquito," due April 16. The group made its first Alternative Songs appearance nine years ago this week with the eventual No. 9-peaking "Maps."

Debut No. 38 "X-Kid" Green Day

Country Airplay*** No. 1 (2 weeks)*** "One Of Those Nights" Tim McGrawGreatest Gainer No. 7 "I Drive Your Truck" Lee BriceHot Shot Debut No. 37 "DONE." The Band PerryDebut No. 40 "Beat This Summer" Brad PaisleyDebut ! No. 56 "B! etter" Maggie Rose

Latin Airplay*** No. 1 (3 weeks)*** "Zumba" Don OmarGreatest Gainer No. 5 "Llevame Contigo" Romeo SantosDebut No. 41 "Troublemaker" Olly Murs Featuring Flo RidaDebut No. 44 "Rompe La Cintura" Alexis & FidoDebut No. 47 "Aqui Estoy" Calibre 50Debut No. 49 "El Coco No" Roberto Junior y Su Bandeno

Regional Mexican Songs*** No. 1 (5 weeks)*** "Y Ahora Resulta" Voz de MandoGreatest Gainer No. 7 "Tu No Tienes La Culpa" Julion Alvarez y Su Norteno Banda

Latin Pop Songs*** No. 1 (2 weeks)*** "Zumba" Don OmarGreatest Gainer No. 5 "Llevame Contigo" Romeo SantosDebut No. 36 "No Soy Un Hombre Malo" Hector Acosta "El Torito"Debut No. 38 "Mojado" Ricardo ArjonaDebut No. 40 "When I Was Your Man" Bruno Mars

Tropical Songs*** No. 1 (2 weeks)*** "Te Me Vas" Prince RoyceDebut/Greatest Gainer No. 12 "Descontrolame" Luis EnriqueDebut No. 36 "Yo La Amo" Ruina Nueva Featuring Adolescent's OrquestaDebut No. 37 "Rompe La Cintura" Alexis & Fido

Christian Songs*** No. 1 (5 weeks)*** "Whom Shall I Fear (God Of Angel Armies)" Chris TomlinGreatest Gainer No. 19 "Middle Of Your Heart" for King & CountryDebut No. 31 "We Won't Be Shaken" Building 429Debut No. 36 "What Are You Waiting For" Shawn McDonaldDebut No. 43 "Dreams And Disasters" Owl City

Gospel Songs*** No. 1 (18 weeks)*** "Take Me To The King" Tamela MannDebut No. 19 "Here In Our Praise" Fred Hammond/United TenorsDebut/Greatest Gainer No. 20 "If He Did It Before (Same God)" Tye TribbettDebut No. 28 "Shine" Sheri Jones-MoffettDebut No. 29 "Indescribable" Kierra Sheard