Couple Ellen DeGeneres and Portia de Rossi seem to be better than ever despite recent divorce rumors this summer -- especially after DeGeneres' showed off de Rossi's recent amazing anniversary gift. But, will the couple take the ALS Ice Bucket Challenge?

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On Saturday, DeGeneres tweeted "Look what my wife did for our wedding anniversary. Six!" showing herself and de Rossi underneath sky writing with the word "Six." The couple was celebrating their sixth wedding anniversary in early August.

On Sunday, Justin Bieber nominated DeGeneres via his Instagram account to take the ice challenge for ALS, along with President Barack Obama and comedian Chris D'Elia. Although, DeGeneres has tweeted jokes, the talk show host hasn't yet responded to Bieber's nomination.

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The ALS Ice Bucket Challenge has swept the world and benefits ALS a.k.a. Lou Gehrig's disease. The rules for the ALS Challenge are that you either accept the challenge by pouring ice on your head and also donating ten dollars to the ALS charity of your choice. If you don't want to pour ice, the nominated person may donate 100 dollars to the ALS charity of their choice. Many celebrities have done it, including former President George W. Bush, Ryan Seacrest, Scandal star Kerry Washington and Kermit the Frog. For more information you can visit ALSA.org.

DeGeneres and de Rossi haven't had the easiest summer. Reports said in May that de Rossi went to rehab for alcohol, but the couple has stayed together.

"They've had their ups and downs," a source told People magazine back in July about their marriage. "Portia has been very outspoken about previous issues, like her eating disorder, and she's good at seeking help when she needs to. They've worked out difficulties in the past, and no doubt they're trying to work out any problems right now."