Justin Bieber Vs. Carly Rae Jepsen - let the pop battle commence!

Justin Bieber and Carly Rae Jepsen battle it out to be Number 1 on this week's Official Singles Chart. Find out who's in the lead, and see this week's Official update Top 40 in full!

Ding! Ding! This week’s Official Chart battle kicks off here!

In the blue corner…. pop poster boy Justin Bieber enters the ring this week with new single Boyfriend. The first track taken from Bieber’s forthcoming third studio album Believe, Boyfriend is a slight departure from his usual sound. Written and produced by Mike Posner and Mason Levy, the track has already been compared to the likes of Justin Timberlake.

Silhouetted Michael Jackson-inspired teaser clips for the upcoming Boyfriend promo video have begun appearing online this week keeping Beliebers everywhere in anticipation of its full unveiling. Boyfriend starts the week at Number 2 on the Official Singles Chart Update.

Over in the pink corner…last weekend’s surprise chart topper and fellow Canadian newcomer Carly Rae Jepsen currently leads the field in the Official Singles Chart race with the summery, feel-good Call Me Maybe. The former Canadian Idol contestant came out of nowhere to land a debut Number 1 on Sunday, and also became the second fastest selling single of 2012 to date, with a week 1 opening sale of nearly 107,000 copies.

Call Me Maybe became an internet phenomenon last month when Justin Bieber, Selina Gomez, Ashley Tisdale and Big Time Rush recorded their own spoof video and uploaded it to YouTube. It was also Justin Bieber who first tweeted his appreciation of Carly Rae Jepsen, much in the same way as Usher was an early champion of Bieber.

Speaking about Bieber’s support, Carly recently commented "They say it's called paying it forward since Usher signed Bieber and then he signed me, so I'm gonna hope that I have the opportunity. That'd be pretty rad.”

The final bell will ring on the Official Chart this Sunday at 7pm. Be sure to log on to OfficialCharts.com to see who emerges victorious.

New entries and high climbers

R’n’B star Usher is back with new single Climax (3), while Sway is on course to enter at Number 7 this weekend with new track Level Up. Meanwhile Breathe Carolina and Fun FT Janelle Monae all look set for Top 40 hits with Blackout (23), and We Are Young (36), respectively.

This week’s highest climber comes courtesy of Together In Electric Dreams. Featured as the soundtrack to the latest EDF Energy TV ad campaign, the Phil Oakey/Giorgio Moroder classic leaps a massive 80 places today to Number 38.

See the Official Singles Chart Update Top 40 in full below:

Official Singles Chart Update Top 40
01 CALL ME MAYBE - CARLY RAE JEPSEN
02 BOYFRIEND - JUSTIN BIEBER
03 CLIMAX - USHER
04 STARSHIPS - NICKI MINAJ
05 SOMEBODY THAT I USED TO KNOW - GOTYE FT KIMBRA
06 SHE DOESN'T MIND - SEAN PAUL
07 LEVEL UP - SWAY
08 TITANIUM - DAVID GUETTA FT SIA
09 WILD ONES - FLO RIDA FT SIA
10 PART OF ME - KATY PERRY
11 TURN UP THE MUSIC - CHRIS BROWN
12 212 - AZEALIA BANKS FT LAZY JAY
13 NEXT TO ME - EMELI SANDE
14 DOMINO - JESSIE J
15 LAST TIME - LABRINTH
16 THE MAN WHO CAN'T BE MOVED - SCRIPT
17 MAMA DO THE HUMP - RIZZLE KICKS
18 OH MY GOODNESS - OLLY MURS
19 TURN ME ON - DAVID GUETTA FT NICKI MINAJ
20 I WON'T GIVE UP - JASON MRAZ
21 N****S IN PARIS - JAY-Z & KANYE WEST
22 SEXY AND I KNOW IT - LMFAO
23 BLACKOUT - BREATHE CAROLINA
24 GREYHOUND - SWEDISH HOUSE MAFIA
25 ELEPHANT - ALEXANDRA BURKE/ERICK MORILLO
26 EARTHQUAKE - LABRINTH FT TINIE TEMPAH
27 TAKE CARE - DRAKE FT RIHANNA
28 STRONGER (WHAT DOESN'T KILL YOU) - KELLY CLARKSON
29 HOT RIGHT NOW - DJ FRESH FT RITA ORA
30 SORRY FOR PARTY ROCKING - LMFAO
31 ILL MANORS - PLAN B
32 DRUNK - ED SHEERAN
33 WE ARE YOUNG - RAINBOW MIX
34 TEENAGE DIRTBAG - WHEATUS
35 PARADISE - COLDPLAY
36 WE ARE YOUNG - FUN FT JANELLE MONAE
37 DROPS OF JUPITER (TELL ME) - TRAIN
38 TOGETHER IN ELECTRIC DREAMS - PHIL OAKEY & GIORGIO MORODER
39 END OF TIME - BEYONCE
40 THE SWARM - YOU ME AT SIX